Plant nutrition research: Priorities to meet human needs for food in sustainable ways

citation_title=World Agriculture Towards 2010: An FAO Study; citation_publication_date=1995; citation_id=CR1; citation_author=N Alexandratos; citation_publisher=John Wiley and Sons

citation_journal_title=Plant Soil; citation_title=Cereal/legume rotations affect chemical properties and biological activities in two West African soils; citation_author=S Alvey, M Bagayoko, G Neumann, A Buerkert; citation_volume=231; citation_publication_date=2001; citation_pages=45-54; citation_id=CR2

citation_title=Genetics of acid tolerant plant; citation_inbook_title=Plant-Soil Interactions at Low pH; citation_publication_date=1991; citation_pages=1007-1017; citation_id=CR3; citation_author=A. M. Aniol; citation_publisher=Kluwer Academic Publisher

citation_journal_title=Food Nutr. Bull.; citation_title=The potential for increasing the iron and zinc density of maize through plant-breeding; citation_author=M Banziger, J Long; citation_volume=21; citation_publication_date=2000; citation_pages=397-400; citation_id=CR4

citation_journal_title=Am. J. Bot.; citation_title=The efficiency of Arabidopsis thaliana (Brassicaceae) root hairs in phosphorus acquisition; citation_author=T. R. Bates, J. P. Lynch; citation_volume=87; citation_publication_date=2000; citation_pages=964-970; citation_id=CR5

citation_journal_title=Soil Use Manage.; citation_title=A world data set of derived soil properties by FAO-UNESCO soil unit for global modelling; citation_author=N. H. Batjes; citation_volume=13; citation_publication_date=1997; citation_pages=9-16; citation_id=CR6

citation_journal_title=Nutr. Cycl. Agroecosyst.; citation_title=The role of legume fallows in intensified upland rice-based systems ofWest Africa; citation_author=M Becker, D. E. Johnson; citation_volume=53; citation_publication_date=1999; citation_pages=71-81; citation_id=CR7

citation_journal_title=Food Nutr. Bull.; citation_title=Research on trace minerals in the common bean; citation_author=S Beebe, A. V. Gonzalez, J Rengifo; citation_volume=21; citation_publication_date=2000; citation_pages=387-391; citation_id=CR8

Bekunda M A, Bationo A and Ssali H 1997 Soil fertility management in Africa: a review of selected research trials. In Replenishing Soil in Africa. pp. 63-79. SSSA Special Books, No. 51, Madison, WI.

citation_journal_title=Soil Biol. Biochem.; citation_title=The contribution of biological nitrogen fixation for sustainable agricultural systems in the tropics; citation_author=R. M. Boddey, S. A. De Moraes, B. J. R. Alves, U Urquiaga; citation_volume=29; citation_publication_date=1997; citation_pages=787-799; citation_id=CR10

citation_journal_title=Fertil. News; citation_title=Fertilizer: To nourish infertile soil that feeds a fertile population that crowds a fragile world; citation_author=N. E. Borlaug, C. R. Dowswell; citation_volume=387; citation_publication_date=1993; citation_pages=11-20; citation_id=CR11

citation_journal_title=Food Nutr. Bull.; citation_title=The Consultative Group on International Agricultural Research (CGIAR) Micronutrients Project: justification and objectives; citation_author=H Bouis, R. D. Graham, R. M. Welch; citation_volume=21; citation_publication_date=2000; citation_pages=374-381; citation_id=CR12

citation_journal_title=Soil Sci. Soc. Am. J.; citation_title=Mechanism of residue mulch-induced cereal growth increases in West Africa; citation_author=A Buerkert, A Bationo, K Dosso; citation_volume=64; citation_publication_date=2000; citation_pages=346-358; citation_id=CR13

citation_title=The role of fertilizer in sustaining food security and protecting the environment to 2020, 2020 Vision Discussion Paper 17; citation_publication_date=1996; citation_id=CR14; citation_author=B. L. Bumb; citation_author=C. A. Baanante; citation_publisher=International Food Policy Research Institute

citation_title=Population growth, food production and nutrient requirements; citation_inbook_title=Journal of Crop Production; citation_publication_date=1998; citation_pages=1-27; citation_id=CR15; citation_author=B. H. Byrnes; citation_author=B. L. Bumb; citation_publisher=The Haworth Press

citation_journal_title=Plant Soil; citation_title=Zinc deficiency as a critical nutritional problem in wheat production in Central Anatolia; citation_author=I Cakmak, A Yilmaz, H Ekiz, B Torun, B. Erenoglu, H. J. Braun; citation_volume=180; citation_publication_date=1996; citation_pages=165-172; citation_id=CR16

citation_journal_title=Plant Soil; citation_title=Phytosiderophore release in bread and durum wheat genotypes differing in zinc efficiency; citation_author=I Cakmak, N Sari, H Marschner, H Ekiz, M Kalayci, A Yilmaz, H. J. Braun; citation_volume=180; citation_publication_date=1996; citation_pages=183-189; citation_id=CR17

citation_journal_title=Plant Soil; citation_title=Role of rye chromosomes in improvement of zinc efficiency in wheat and triticale; citation_author=I Cakmak, R Derici, B Torun, I Tolay, H. J. Braun, R Schlegel; citation_volume=196; citation_publication_date=1997; citation_pages=249-253; citation_id=CR18

citation_journal_title=Euphytica; citation_title=Morphological and physiological differences in cereals in response to zinc deficiency; citation_author=I Cakmak, B Torun, B Erenoglu, L Oztürk, H Marschner, M Kalayci, H Ekiz, A Yilmaz; citation_volume=100; citation_publication_date=1998; citation_pages=349-357; citation_id=CR19

citation_journal_title=Field Crops Res.; citation_title=Zinc deficiency as a practical problem in plant and human nutrition in Turkey: A NATO-Science for Stability Project; citation_author=I Cakmak, M Kalayci, H Ekiz, H. J. Braun, A Yilmaz; citation_volume=60; citation_publication_date=1999; citation_pages=175-188; citation_id=CR20

citation_journal_title=Plant Soil; citation_title=Expression of high zinc efficiency of Aegilops tauschii and Triticum monococcum in synthetic hexaploid wheats; citation_author=I Cakmak, O Cakmak, S Eker, A Ozdemir, N Watanabe, H. J. Braun; citation_volume=215; citation_publication_date=1999; citation_pages=203-209; citation_id=CR21

citation_journal_title=Food Nutr. Bull.; citation_title=Zinc and iron concentrations in seeds of wild, primitive and modern wheats; citation_author=I Cakmak, H Ozkan, H. J. Braun, R. M. Welch, V Romheld; citation_volume=21; citation_publication_date=2000; citation_pages=401-403; citation_id=CR22

citation_journal_title=Adv. Agron.; citation_title=Acid soil tolerance in wheat; citation_author=B. F. Carver, J. D. Ownby; citation_volume=54; citation_publication_date=1995; citation_pages=117-173; citation_id=CR23

citation_journal_title=Adv. Agron.; citation_title=Iron nutrition of plants in calcareous soils; citation_author=Y Chen, P Barak; citation_volume=35; citation_publication_date=1982; citation_pages=217-240; citation_id=CR24

citation_journal_title=Trends Plant Sci.; citation_title=Molecular and physiological aspects of nitrate uptake in plants; citation_author=N. M. Crawford, A. D. M. Glass; citation_volume=10; citation_publication_date=1998; citation_pages=389-395; citation_id=CR25

citation_journal_title=Soil Biol. Biochem.; citation_title=Contribution of legume nitrogen fixation to sustainable agriculture in Sub-Saharan Africa; citation_author=F. D. Dakora, S. O. Keya; citation_volume=29; citation_publication_date=1997; citation_pages=809-817; citation_id=CR26

citation_journal_title=Adv. Agron.; citation_title=Soil organic phosphorus; citation_author=R. C. Dalal; citation_volume=29; citation_publication_date=1977; citation_pages=83-117; citation_id=CR27

citation_journal_title=Planta; citation_title=Functional analysis and cell-specific expression of a phosphate transporter from tomato; citation_author=P Daram, S Brunner, N Amrhein, M Bucher; citation_volume=206; citation_publication_date=1998; citation_pages=225-233; citation_id=CR28

citation_journal_title=Science; citation_title=Aluminum tolerance in transgenic plants by alteration of citrate synthesis; citation_author=M. J. De la Fuente, V Ramirez-Rodriguez, J. L. Cabrera-Ponce, L Herrera-Estrella; citation_volume=276; citation_publication_date=1997; citation_pages=1566-1568; citation_id=CR29

citation_journal_title=Agron.; citation_title=Advances in the understanding of aluminium toxicity and the development of aluminium-tolerant transgenic plants Adv; citation_author=J. M. De la Fuente, L Herrera-Estrella; citation_volume=66; citation_publication_date=1999; citation_pages=103-120; citation_id=CR30

citation_journal_title=Outlook Agric.; citation_title=The management of acid soils in Africa; citation_author=E. F. De Pauw; citation_volume=23; citation_publication_date=1994; citation_pages=11-16; citation_id=CR31

citation_journal_title=Plant Physiol.; citation_title=Expression of a Pseudomonas aeruginosa citrate synthase gene in tobacco is not associated with either enhanced citrate accumulation or efflux; citation_author=E Delhaize, D. M. Hebb, P. R. Ryan; citation_volume=125; citation_publication_date=2001; citation_pages=2059-2067; citation_id=CR32

citation_journal_title=Plant Cell Environ.; citation_title=Citric acid excretion and precipitation of calcium citrate in the rhizosphere of white lupin (Lupinus albus L.); citation_author=B Dinkelaker, V Römheld, H Marschner; citation_volume=12; citation_publication_date=1989; citation_pages=285-292; citation_id=CR33

citation_journal_title=Outlook Agricult.; citation_title=The role of arbuscular mycorrhizal fungi in agroand natural ecosystems; citation_author=J. C. Dodd; citation_volume=29; citation_publication_date=2000; citation_pages=55-62; citation_id=CR34

citation_journal_title=Proc. Natl. Acad. Sci. USA; citation_title=World food trends and prospects to 2025; citation_author=T Dyson; citation_volume=96; citation_publication_date=1999; citation_pages=5929-5936; citation_id=CR35

citation_journal_title=J. Environ. qual.; citation_title=Phosphorus and nitrogen in runoff following beef cattle manure or compost application; citation_author=B Eghball, J. E. Gilley; citation_volume=28; citation_publication_date=1999; citation_pages=1201-1210; citation_id=CR36

citation_journal_title=J. Environ. Qual.; citation_title=Phosphorus movement and adsorption in a soil receiving long-term manure and fertilizer application; citation_author=B Eghball, G. D. Binford, D. D. Baltensperger; citation_volume=25; citation_publication_date=1996; citation_pages=1339-1343; citation_id=CR37

citation_journal_title=Proc. Natl. Acad. Sci. USA; citation_title=A novel ironregulated metal transporter from plants identified by functional expression in yeast; citation_author=D Eide, M Broderius, J Fett, M Guerinot; citation_volume=93; citation_publication_date=1996; citation_pages=5624-5628; citation_id=CR38

citation_journal_title=J. Plant Nutr.; citation_title=Use of hydrogen release or a combination of hydrogen release and iron reduction for selecting iron-efficient dry bean and soybean cultivars; citation_author=J. W. Ellsworth, V. D. Jolley, D. S. Nualand, A. D. Blaylock; citation_volume=12; citation_publication_date=1998; citation_pages=2639-2651; citation_id=CR39

citation_journal_title=J. Plant Nutr.; citation_title=Effects of zinc fertilization and irrigation on grain yield and zinc concentration of various cereals grown in zinc-deficient calcareous soils; citation_author=H Ekiz, S. A. Bagci, A. S. Kiral, S Eker, I Gültekin, A Alkan, I Cakmak; citation_volume=21; citation_publication_date=1998; citation_pages=2245-2256; citation_id=CR40

citation_journal_title=J. Plant Nutr.; citation_title=Phytosiderophore release does not correlate well with zinc efficiency in different bread wheat genotypes; citation_author=B Erenoglu, I Cakmak, H Marschner, V Römheld, S Eker, H Daghan, M Kalayci, H Ekiz; citation_volume=19; citation_publication_date=1996; citation_pages=1569-1580; citation_id=CR41

citation_journal_title=Ecosystems; citation_title=Nitrogen oxide fluxes and nitrogen cycling during postagricultural succession and forest fertilization in the humid tropics; citation_author=H Erickson, M Keller, E. A. Davidson; citation_volume=4; citation_publication_date=2001; citation_pages=67-84; citation_id=CR42

citation_journal_title=Proc. Natl. Acad. Sci. USA; citation_title=Global and local implications of biotechnology and climate change for future food supplies; citation_author=R. E. Evenson; citation_volume=96; citation_publication_date=1999; citation_pages=5921-5928; citation_id=CR43

citation_title=Status of Plant Available Micronutrients in Turkish Soils; citation_inbook_title=Annual Report. Report No. R-118; citation_publication_date=1993; citation_pages=25-32; citation_id=CR44; citation_author=F Eyupoglu; citation_author=N Kurucu; citation_author=U Sanisa; citation_publisher=Soil and Fertilizer Research Institute

FAO 1996 Food, Agriculture and Food Security: Developments Since the World Food Conference and Prospects, World Food Summit Technical Background Document No. 1 Rome.

citation_title=The State of Food Insecurity in the World; citation_publication_date=1999; citation_id=CR46; citation_publisher=FAO

citation_title=Fertilizer requirements in 2015 and 2030; citation_publication_date=2000; citation_id=CR47; citation_publisher=FAO

citation_journal_title=J. Plant Nutr.; citation_title=Development of genetic resistance to irondeficiency chlorosis in soybean; citation_author=D. J. Fairbanks; citation_volume=23; citation_publication_date=2000; citation_pages=1903-1913; citation_id=CR48

citation_journal_title=Plant Soil; citation_title=Direct evidence on participation of root hairs in phosphorus (32P) uptake from soil; citation_author=T. S. Gahoonia, E. N. Nielsen; citation_volume=198; citation_publication_date=1998; citation_pages=147-152; citation_id=CR49

citation_journal_title=Eur. J. Agron.; citation_title=Root-released organic acids and phosphorus uptake of two barley cultivars in laboratory and field experiments; citation_author=T. S. Gahoonia, F Asmar, H Giese, null Gissel-Nielsen, N. E. Nielsen; citation_volume=12; citation_publication_date=2000; citation_pages=281-289; citation_id=CR50

citation_journal_title=Plant Soil; citation_title=Low-P tolerance by maize (Zea mays L.) genotypes: significance of root growth, and organic acids and acid phosphatase root exudation; citation_author=A Gaume, F Machler, C De Leon, L Narro, E Frossard; citation_volume=228; citation_publication_date=2001; citation_pages=253-264; citation_id=CR51

citation_journal_title=Mol. Cell Biol.; citation_title=Two distinctly regulated genes are required for ferric reduction, the first step of iron uptake in Sacchoromyces cerevisiae ; citation_author=E Georgatsou, D Alexandraki; citation_volume=14; citation_publication_date=1994; citation_pages=3065-3073; citation_id=CR52

citation_journal_title=Z. Pflanzenernähr. Bodenkd.; citation_title=Nutrient and water uptake by roots of forest trees; citation_author=E George, H Marschner; citation_volume=159; citation_publication_date=1994; citation_pages=11-21; citation_id=CR53

citation_journal_title=Nat. Biotechnol.; citation_title=Iron fortification of rice seed by the soybean ferritin gene; citation_author=F Goto, T Yoshihara, N Shigemoto, S Toki, F Takaiwa; citation_volume=17; citation_publication_date=1999; citation_pages=282-286; citation_id=CR54

citation_title=Breeding for staple-food crops with high micronutrient density; citation_inbook_title=Agricultural Strategies for Micronutrients; citation_publication_date=1996; citation_id=CR55; citation_author=R. D. Graham; citation_author=R. M. Welch; citation_publisher=International Food Policy Research Institute

citation_title=Genotypic variation in zinc uptake and utilization by plants; citation_inbook_title=Zinc in Soils and Plants; citation_publication_date=1993; citation_pages=107-118; citation_id=CR56; citation_author=R. D. Graham; citation_author=Z Rengel; citation_publisher=Kluwer Academic Publishers

citation_journal_title=Plant Soil; citation_title=Selecting zincefficient cereal genotypes for soils of low zinc status; citation_author=R. D. Graham, J. S. Ascher, S. C. Hynes; citation_volume=146; citation_publication_date=1992; citation_pages=241-250; citation_id=CR57

citation_journal_title=Field Crops Res.; citation_title=Breeding for micronutrients density in edible portions of staple food crops: conventional approaches; citation_author=R. D. Graham, D Senadhira, S. E. Beebe, C Iglesias, I Ortiz-Monasterio; citation_volume=60; citation_publication_date=1999; citation_pages=57-80; citation_id=CR58

citation_journal_title=Adv. Agron.; citation_title=Addressing micronutrient malnutrition through enhancing the nutritional quality of staple foods: Principles, perspectives and knowledge gaps; citation_author=R. D. Graham, R. M. Welch, H. E. Bouis; citation_volume=70; citation_publication_date=2001; citation_pages=77-142; citation_id=CR59

citation_journal_title=Food Nutr. Bull.; citation_title=Breeding for trace mineral density in rice; citation_author=G. B. Gregory, D Senadhira, H Htut, R. D. Graham; citation_volume=21; citation_publication_date=2000; citation_pages=382-386; citation_id=CR60

citation_journal_title=Proc. Natl. Acad. Sci. USA; citation_title=Identification of a family of zinc transporter genes from Arabidopsis that respond to zinc deficiency; citation_author=N Grotz, T Fox, E Connolly, W Park, M. L. Guerinot, D Eide; citation_volume=12; citation_publication_date=1998; citation_pages=7220-7224; citation_id=CR61

citation_title=Integrated nutrient management, soil fertility, and sustainable agriculture: Current issues and future challenges; citation_inbook_title=Food, Agriculture, and the Environment Discussion Paper 32; citation_publication_date=2000; citation_id=CR62; citation_author=P Gruhn; citation_author=F Goletti; citation_author=M Yudelman; citation_publisher=International Food Policy Research Institute

citation_journal_title=Can. J. Soil Sci.; citation_title=Iron status of crops in Prince Edward Island and effect of soil pH on plant iron concentration; citation_author=U. C. Gupta; citation_volume=71; citation_publication_date=1991; citation_pages=197-202; citation_id=CR63

citation_title=The early history of wheat: earliest traces to the sack of Rome; citation_inbook_title=Wheat Science-Today and Tomorrow; citation_publication_date=1981; citation_id=CR64; citation_author=J. R. Harlan; citation_publisher=Cambridge University Press

citation_journal_title=J. Plant Physiol.; citation_title=Phytase and acid phosphatase activities in extracts from roots of temperate pasture grass and legume seedlings Aust; citation_author=J. E. Hayes, A. E. Richardson, R. J. Simpson; citation_volume=26; citation_publication_date=1999; citation_pages=, 801-809; citation_id=CR65

citation_journal_title=Nutr. Cycl. Agroecosyst.; citation_title=Amelioration of Al toxicity and P deficiency in acid soils by additions of organic residues: a critical review of the phenomenon and the mechanisms involved; citation_author=R. J. Haynes, M. S. Mokolobate; citation_volume=59; citation_publication_date=2001; citation_pages=47-63; citation_id=CR66

citation_journal_title=Curr. Opin. Biotechnol.; citation_title=Plant concepts for mineral acquisition and allocation; citation_author=R Hell, H Hillebrand; citation_volume=12; citation_publication_date=2001; citation_pages=161-168; citation_id=CR67

citation_title=Nutrient depletion in the agricultural soils of Africa. 2020 Vision Brief 62; citation_publication_date=1999; citation_id=CR68; citation_author=J Henao; citation_author=C Baanante; citation_publisher=International Food Policy Research Institute

citation_journal_title=Proc. Natl. Acad. Sci. USA; citation_title=Transgenic plants for tropical regions: Some considerations about their development and their transfer to the small farmer; citation_author=L Herrera-Estrella; citation_volume=96; citation_publication_date=1999; citation_pages=5978-5981; citation_id=CR69

citation_journal_title=Plant Physiol.; citation_title=Cloning of nicotianamine synthase genes, novel genes involved in the biosynthesis of phytosiderophores; citation_author=K Higuchi, K Suzuki, Y Nakanishi, H Yamaguchi, N. K. Nishizawa, S Mori; citation_volume=119; citation_publication_date=1999; citation_pages=471-479; citation_id=CR70

citation_journal_title=Plant J.; citation_title=Nicotianamine synthase gene expression differs in barley and rice under Fe-deficient conditions; citation_author=K Higuchi, S. Watanabe, M Takahashi, S Kawasaki, H Nakanishi, N. K. Nishizawa, S Mori; citation_volume=25; citation_publication_date=2001; citation_pages=159-167; citation_id=CR71

citation_journal_title=Trends Biotechnol.; citation_title=Improving nutrient capture from soil by the genetic manipulation of crop; citation_author=R. E. Hirsch, M. R. Susman; citation_volume=17; citation_publication_date=1999; citation_pages=356-361; citation_id=CR72

citation_journal_title=Plant Soil; citation_title=Solubilisation of rock phosphate by rape. 2. Local root exudation of organic acids as a response to P starvation; citation_author=E Hoffland, G. R. Findenegg, J. A. Nelemans; citation_volume=113; citation_publication_date=1989; citation_pages=161-165; citation_id=CR73

citation_journal_title=Aust. J. Soil. Res.; citation_title=Soil phosphorus, its measurements and its uptake by plants; citation_author=I. C. R. Holford; citation_volume=35; citation_publication_date=1997; citation_pages=227-239; citation_id=CR74

citation_journal_title=J. Plant Nutr.; citation_title=Phytosiderophore release by sorghum, wheat and corn under zinc deficiency; citation_author=B. G. Hopkins, D. A. Whitney, R. E. Lamond, V. D. Jolley; citation_volume=21; citation_publication_date=1997; citation_pages=2623-2637; citation_id=CR75

citation_journal_title=Z. Pflanzenernähr. Bodenkd.; citation_title=The role of apoplast in aluminium toxicity and resistance in higher plants: a review; citation_author=W. J. Horst; citation_volume=158; citation_publication_date=1995; citation_pages=419-428; citation_id=CR76

citation_journal_title=Plant Soil; citation_title=Rotation of maize with cowpea improves yield and nutrient use of maize compared to maize monocropping in an alfisol in the northern Guinea Savanna of Ghana; citation_author=W. J. Horst, R Hardter; citation_volume=160; citation_publication_date=1994; citation_pages=171-183; citation_id=CR77

citation_journal_title=Nutr. Cycl. Agroecosyst.; citation_title=Fertilizer use in Asian agriculture: implications for sustaining food security and the environment; citation_author=M Hossain, V. P. Singh; citation_volume=57; citation_publication_date=2000; citation_pages=155-169; citation_id=CR78

citation_journal_title=Nutr. Cycl. Agroecosyst.; citation_title=An assessment of human influences on fluxes of nitrogen from the terrestrial landscape to the estuaries and continental shelves of the North Atlantic Ocean; citation_author=R. W. Howarth; citation_volume=52; citation_publication_date=1998; citation_pages=213-223; citation_id=CR79

citation_journal_title=Commun. Soil Sci. Plant Anal.; citation_title=Aluminium detoxification with green manures; citation_author=N. V. Hue, I Amien; citation_volume=20; citation_publication_date=1989; citation_pages=1499-1511; citation_id=CR80

citation_journal_title=Commun. Soil Sci. Plant Anal.; citation_title=Increasing plant available phosphorus in an Ultisol with a yard-waste compost; citation_author=N. V. Hue, H Ikawa, J. A. Silva; citation_volume=25; citation_publication_date=1994; citation_pages=3291-3303; citation_id=CR81

citation_journal_title=Aust. J. Agric. Res.; citation_title=Effects of time of application of urea application on combine-sown Calrose rice in south-east Australia. III. Fertilizer nitrogen recovery, efficiency of fertilization and soil nitrogen supply; citation_author=E Humphreys, P. M. Chalk, W. A. Muirhead, F. M. Melhuish, R. J. G. White; citation_volume=38; citation_publication_date=1987; citation_pages=129-138; citation_id=CR82

citation_journal_title=Field Crops Res.; citation_title=Environmental factors affecting N2 fixation in grain legumes in the tropics, with an emphasis on Brazil; citation_author=M Hungria, M. A. T. Vargas; citation_volume=65; citation_publication_date=2000; citation_pages=151-164; citation_id=CR83

Isherwood K F 2000 The state of the fertilizer industry: past, present and future. Annual General Meeting. 68th IFA Annual Conference 22-25 May 2000, Oslo, Norway.

citation_journal_title=Adv. Agron.; citation_title=Organic amendments and phosphorus sorption by soils; citation_author=E Iyamuremye, R. P. Dick; citation_volume=56; citation_publication_date=1996; citation_pages=139-185; citation_id=CR85

citation_journal_title=J. Plant Nutr.; citation_title=Using root iron-reduction capacity for genotype evaluation of iron efficiency in soybean; citation_author=V. D. Jolley, D. J. Fairbanks, W. B. Stevens, R. E. Terry, J. H. Orf; citation_volume=15; citation_publication_date=1992; citation_pages=1679-1690; citation_id=CR86

citation_journal_title=J. Plant Nutr.; citation_title=Plant physiological responses for genotypic evaluation of iron efficiency in Strategy I and Strategy II plants: A review; citation_author=V. D. Jolley, K. A. Cook, N. C. Hansen, W. B. Stevens; citation_volume=19; citation_publication_date=1996; citation_pages=1241-1255; citation_id=CR87

citation_journal_title=Field Crops Res.; citation_title=Grain yield, zinc efficiency and zinc concentration of wheat cultivars grown in a zinc-deficient calcareous soil in field and greenhouse; citation_author=M Kalayci, B Torun, S Eker, M Aydin, L Ozturk, I Cakmak; citation_volume=63; citation_publication_date=1999; citation_pages=87-98; citation_id=CR88

citation_journal_title=J. Exp. Bot.; citation_title=Nicotianamine aminotransferase activities are correlated to the phytosiderophore secretions under Fe-deficient conditions in Gramineae; citation_author=K Kanazawa, K Higuchi, N. K. Nishizawa, S Fushiya, M Chino, S Mori; citation_volume=45; citation_publication_date=1994; citation_pages=1903-1906; citation_id=CR89

citation_journal_title=J. Plant Nutr.; citation_title=Mugineic acid-family phytosiderophores in root-secretions of barley, corn and sorghum varieties; citation_author=S Kawai, S Takagi, Y Sato; citation_volume=11; citation_publication_date=1988; citation_pages=633-642; citation_id=CR90

citation_journal_title=Annu. Rev. Plant Physiol. Plant Mol. Biol.; citation_title=Cellular mechanisms of aluminium toxicity and resistance in plants; citation_author=L. V. Kochian; citation_volume=46; citation_publication_date=1995; citation_pages=237-260; citation_id=CR91

citation_journal_title=Plant Cell Physiol.; citation_title=Overexpression of mitochondrial citrate synthase in Arabidopsis thaliana improved growth on a phosphorus-limited soil; citation_author=H Koyama, A Kawamura, T Kihara, T Hara, E Takita, D Shibata; citation_volume=9; citation_publication_date=2000; citation_pages=1030-1037; citation_id=CR92

citation_journal_title=Nutr. Cycl. Agroecosyst.; citation_title=Nitrogen inputs to rivers, estuaries and continental shelves and related nitrous oxide emissions in 1990 and 2050: a global model; citation_author=C Kroeze, S. P. Seitzinger; citation_volume=52; citation_publication_date=1998; citation_pages=145-212; citation_id=CR93

citation_journal_title=Plant Soil; citation_title=Acquisition of phosphorus and copper by VA-mycorrhizal hyphae and root-to-shoot transport in white clover; citation_author=X. L. Li, H Marschner, E George; citation_volume=136; citation_publication_date=1991; citation_pages=49-57; citation_id=CR94

citation_journal_title=J. Plant Nutr.; citation_title=Molecular characterisation of iron deficiency chlorosis in soybean; citation_author=S. F. Lin, D Grandt, S Cianzio, R Shoemaker; citation_volume=23; citation_publication_date=2000; citation_pages=1929-1939; citation_id=CR95

citation_journal_title=Plant Soil; citation_title=Plant nutrition in 20th and perspectives for the 21st century; citation_author=J. P. Loneragen; citation_volume=196; citation_publication_date=1997; citation_pages=163-174; citation_id=CR96

citation_journal_title=Plant Sci.; citation_title=Organic acid metabolism in plants: from adaptive physiology to transgenic varieties for cultivation in extreme soils; citation_author=J Lopez-Bucio, M. F. Nieto-Jacobo, V Ramirez-Rodriguez, L Herrera-Estrella; citation_volume=160; citation_publication_date=2000; citation_pages=1-13; citation_id=CR97

citation_journal_title=Nat. Biotechnol.; citation_title=Enhanced phosphorus uptake in transgenic tobacco plants that overproduce citrate; citation_author=J Lopez-Bucio, O Martinez de la Vega, A Guevara-Garcia, L Herrera-Estrella; citation_volume=18; citation_publication_date=2000; citation_pages=450-453; citation_id=CR98

citation_journal_title=Plant Cell Physiol.; citation_title=Specific secretion of citric acid induced by Al stress in Cassia tora L; citation_author=J. F. Ma, S. J. Zheng, H Matsumoto; citation_volume=38; citation_publication_date=1997; citation_pages=1019-1025; citation_id=CR99

citation_journal_title=Trends Plant Sci.; citation_title=Aluminium tolerance in plants and the complexing role of organic acids; citation_author=J. F. Ma, P. R. Ryan, E Delhaize; citation_volume=6; citation_publication_date=2001; citation_pages=273-278; citation_id=CR100

Maene L M 2000 Efficient fertilizer use and its role in increasing food production and protecting the environment. 6th AFA International Annual Conference 31 January-3 February 2000, Cairo, Egypt.

citation_journal_title=Plant Soil; citation_title=Mechanisms of adaptation of plants to acid soils; citation_author=H Marschner; citation_volume=134; citation_publication_date=1991; citation_pages=1-20; citation_id=CR102

citation_title=Mineral Nutrition of Higher Plants; citation_publication_date=1995; citation_id=CR103; citation_author=H Marschner; citation_publisher=Academic Press.

Marschner H 1998 Soil-root interface: biological and biochemical process. In Soil Chemistry and Ecosystem Health. pp. 191-231. SSSA Special Publication No 52. Madison, WI.

citation_journal_title=Plant Soil; citation_title=Strategies of plants for acquisition of iron; citation_author=H Marschner, V Römheld; citation_volume=165; citation_publication_date=1994; citation_pages=261-274; citation_id=CR105

citation_journal_title=J. Plant Nutr.; citation_title=Different strategies in higher plants in mobilization and uptake of iron; citation_author=H Marschner, V Römheld, M Kissel; citation_volume=9; citation_publication_date=1986; citation_pages=695-713; citation_id=CR106

citation_journal_title=Biol. Fertil. Soils; citation_title=Nitrous oxide emissions from grassland and spring barley, following N fertilizer application with and without nitrification inhibitors; citation_author=I. P. McTaggart, H Clayton, J Parker, L Swan, K. A. Smith; citation_volume=25; citation_publication_date=1997; citation_pages=261-268; citation_id=CR107

citation_journal_title=Appl. Soil Ecol.; citation_title=Winter survival of extraradical hyphae and spores of arbuscular mycorrhizal fungi in the field; citation_author=T. P. McGonigle, MH Miller; citation_volume=12; citation_publication_date=1999; citation_pages=41-50; citation_id=CR108

citation_journal_title=Proc. Natl. Acad. Sci. USA; citation_title=Overexpression of an Arabidopsis thaliana high-affinity phosphate transporter gene in tobacco cultured cells enhances cell growth under phosphate-limited conditions; citation_author=N Mitsukowa, S Okumura, Y Shirano, S Sato, T Kato, S Harashima, D Shibata; citation_volume=94; citation_publication_date=1997; citation_pages=7098-7102; citation_id=CR109

citation_journal_title=Food Nutr. Bull.; citation_title=Breeding for trace mineral in wheat; citation_author=I Monasterio, R. D. Graham; citation_volume=21; citation_publication_date=2000; citation_pages=392-396; citation_id=CR110

citation_journal_title=Curr. Opin. Plant Biol.; citation_title=Iron acquisition by plants; citation_author=S Mori; citation_volume=2; citation_publication_date=1999; citation_pages=250-253; citation_id=CR111

citation_journal_title=Biol. Fertil. Soils; citation_title=Soil processes and global change; citation_author=A. R. Mosier; citation_volume=27; citation_publication_date=1998; citation_pages=221-229; citation_id=CR112

citation_title=Use of nitrification inhibitors to reduce nitrous oxide emission from urea fertilized soils; citation_inbook_title=CH and NO: Global Emissions and Controls from Rice Fields and Other Agricultural and Industrial Sources; citation_publication_date=1994; citation_pages=197-207; citation_id=CR113; citation_author=A. R. Mosier; citation_author=K. F. Bronson; citation_author=J. R. Freney; citation_author=D. G. Keerthisinghe; citation_publisher=Yokendo Publishers

citation_journal_title=Biogeochem.; citation_title=Policy implications of human-accelerated nitrogen cycling; citation_author=A. R. Mosier, M. A. Bleken, P Chaiwanakupt, E. C. Ellis, J. R. Freney, R. B. Howarth, P. A. Matson, K Minami, R Naylor, K. N. Weeks, Z. L. Zhu; citation_volume=52; citation_publication_date=2001; citation_pages=281-320; citation_id=CR114

citation_journal_title=Plant Soil; citation_title=Leaf litter ash alkalinity and neutralisation of soil acidity; citation_author=A. D. Noble, I Zenneck, P. J. Randall; citation_volume=179; citation_publication_date=1996; citation_pages=293-302; citation_id=CR115

citation_journal_title=Science; citation_title=Wheat domestication: archaeobotanical evidence; citation_author=M Nesbitt, D Samuel; citation_volume=279; citation_publication_date=1995; citation_pages=1433-1433; citation_id=CR116

citation_journal_title=Plant Soil; citation_title=Introduction of the reconstructed yeast ferric reductase gene, refre1, into tobacco; citation_author=H Oki, H Yamaguchi, H Nakanishi, S Mori; citation_volume=215; citation_publication_date=1999; citation_pages=211-220; citation_id=CR117

citation_journal_title=Planta; citation_title=Organic acid exudation as an aluminium-tolerance mechanism in maize (Zea mays L.); citation_author=D. M. Pellet, D. L. Grunes, L. V. Kochian; citation_volume=196; citation_publication_date=1995; citation_pages=788-795; citation_id=CR118

citation_journal_title=Cereal Chem.; citation_title=Influence of cultivar and environment on mineral and protein concentrations of wheat flour, bran and grain; citation_author=C. J. Peterson, V. A. Johnson, P. J. Mattern; citation_volume=63; citation_publication_date=1986; citation_pages=118-186; citation_id=CR119

Pinstrup-Andersen P 1999 Selected aspects of the future global food situation. In 25th International Fertilizer Industry Association Enlarged Council Meeting, Rome, Italy.

citation_title=World food propects: Critical issues for the early twenty-first century; citation_inbook_title=2020 Vision Food Policy Report; citation_publication_date=1999; citation_id=CR121; citation_author=P Pinstrup-Andersen; citation_author=R Pandya-Lorch; citation_author=M. W. Rosegrant; citation_publisher=International Food Policy Research Institute

citation_journal_title=Agric. Ecosyst. Environ.; citation_title=Use of compost to improve soil properties and crop productivity under low input agricultural system in West Africa; citation_author=E Quedraogo, A Mando, N. P. Zombre; citation_volume=84; citation_publication_date=2001; citation_pages=259-266; citation_id=CR122

citation_journal_title=Annu. Rev. Plant Physiol. Plant Mol. Biol.; citation_title=Phosphate acquisition; citation_author=K. G. Raghothama; citation_volume=50; citation_publication_date=1999; citation_pages=665-693; citation_id=CR123

citation_journal_title=Curr. Opin. Plant Biol.; citation_title=Phosphate transport and signalling; citation_author=K. G. Raghothama; citation_volume=3; citation_publication_date=2000; citation_pages=182-187; citation_id=CR124

citation_journal_title=Field Crops Res.; citation_title=Yield sustainability and phosphorus utilisation in soybean-wheat system on vertisols in response to integrated use of manure and fertilizer phosphorus; citation_author=D. D. Reddy, A. S. Rao, K. S. Reddy, P. N. Takkar; citation_volume=62; citation_publication_date=1999; citation_pages=181-190; citation_id=CR125

citation_title=Physiological mechanisms underlying differential nutrient efficiency of crop genotypes; citation_inbook_title=Mineral Nutrition of Crops: Fundamental Mechanisms and Implications; citation_publication_date=1999; citation_pages=227-265; citation_id=CR126; citation_author=Z Rengel; citation_publisher=The Haworth Press

citation_journal_title=Commun. Soil Sci. Plant Anal.; citation_title=Genotypic differences in micronutrient use efficiency in crops; citation_author=Z Rengel; citation_volume=32; citation_publication_date=2001; citation_pages=1163-1186; citation_id=CR127

citation_journal_title=Plant Soil; citation_title=Importance of seed Zn content for wheat growth on Zn-deficient soil. I. Vegetative growth; citation_author=Z Rengel, R. D. Graham; citation_volume=173; citation_publication_date=1995; citation_pages=259-266; citation_id=CR128

citation_journal_title=J. Plant Physiol.; citation_title=Uptake of zinc iron by wheat genotypes differing in tolerance to zinc deficiency; citation_author=Z Rengel, V Römheld, H. Marschner; citation_volume=152; citation_publication_date=1998; citation_pages=433-438; citation_id=CR129

citation_journal_title=Biol. Rev.; citation_title=Sources and bioavailability of phosphorus fractions in freshwaters: a British perspective; citation_author=C. S. Reynolds, P. S. Davies; citation_volume=76; citation_publication_date=2001; citation_pages=27-64; citation_id=CR130

citation_journal_title=Plant J.; citation_title=Extracellular secretion of Aspergillus phytase from Arabidopsis roots enables plants to obtain phosphorus from phytate; citation_author=A. E. Richardson, P. A. Hadobas, J. E. Hayes; citation_volume=25; citation_publication_date=2001; citation_pages=641-649; citation_id=CR131

citation_journal_title=Plant Soil; citation_title=The froh gene family from Arabidopsis thaliana: putative iron-chelate reductases; citation_author=N. J. Robinson, null Sadjuga, Q. J. Groom; citation_volume=196; citation_publication_date=1997; citation_pages=245-248; citation_id=CR132

citation_journal_title=Nature; citation_title=A ferric-chelate reductase for iron uptake from soils; citation_author=N. J. Robinson, C. M. Procter, E. L. Connolly, M. L. Guerinot; citation_volume=397; citation_publication_date=1999; citation_pages=694-697; citation_id=CR133

citation_journal_title=Field Crops Res.; citation_title=Using legumes to enhance nitrogen fertility and improve soil condition in cotton cropping systems; citation_author=I. J. Rochester, M. B. Peoples, N. R. Hulugalle, R. R. Gault, G. A. Constable; citation_volume=70; citation_publication_date=2000; citation_pages=27-41; citation_id=CR134

citation_journal_title=Plant Soil; citation_title=Characterisation of the tolerance to iron chlorosis in different peach rootstocks grown in nutrient solution. II. Iron-stress response mechanism; citation_author=F. J. Romera, null Alcantara, M. D. dela Guardia; citation_volume=130; citation_publication_date=1991; citation_pages=120-124; citation_id=CR135

citation_journal_title=Plant Physiol.; citation_title=Evidence for a specific uptake system for iron phytosiderophores in roots of grasses; citation_author=V Romheld, H Marschner; citation_volume=80; citation_publication_date=1986; citation_pages=175-180; citation_id=CR136

citation_journal_title=Plant Soil; citation_title=Genotypical differences among graminaceous species in release of phytosiderophores and uptake of iron phytosiderophores; citation_author=V Römheld, H Marschner; citation_volume=123; citation_publication_date=1990; citation_pages=147-153; citation_id=CR137

citation_journal_title=Proc. Nutr. Soc.; citation_title=Alternative future for world cereal and meat consumption; citation_author=M. W. Rosegrant, N Leach, R. V. Gerpacio; citation_volume=58; citation_publication_date=1999; citation_pages=219-234; citation_id=CR138

citation_title=2020 Global Food Outlook; Trends, Alternatives, and Choices. A 2020 Vision for Food, Agriculture, and the Environment Initiative; citation_publication_date=2001; citation_id=CR139; citation_author=M. W. Rosegrant; citation_author=M. S. Paisner; citation_author=S Meijer; citation_author=J Witcover; citation_publisher=International Food Policy Research Institute

citation_journal_title=Planta; citation_title=Characterisation of Alstimulated efflux of malate from the apices of Al-tolerant wheat roots; citation_author=P. R. Ryan, E Delhaize, P. J. Randall; citation_volume=196; citation_publication_date=1995; citation_pages=103-110; citation_id=CR140

citation_journal_title=Plant Physiol.; citation_title=Expression of the yeast FRE genes in transgenic tobacco; citation_author=A. I. Samuelsen, R. C. Martin, D. W. S. Mok, M. C. Mok; citation_volume=118; citation_publication_date=1998; citation_pages=51-58; citation_id=CR141

citation_title=Soil degradation, a threat to developing-country food security by 2020?; citation_publication_date=1999; citation_id=CR142; citation_author=S. J. Scherr; citation_publisher=International Food Policy Research Institute.

citation_title=Physical mapping of rye genes determining micronutritional efficiency in wheat; citation_inbook_title=Plant Nutrition for Sustainable Food Production and Environment; citation_publication_date=1997; citation_pages=287-288; citation_id=CR143; citation_author=R Schlegel; citation_author=I Cakmak; citation_publisher=Kluwer Academic Publishers

citation_journal_title=Euphytica; citation_title=Screening for zinc efficiency among wheat relatives and their utilisation for an alien gene transfer; citation_author=R Schlegel, I Cakmak, B Torun, S Eker, I Tolay, H Ekiz, M Kalayci, H. J. Braun; citation_volume=100; citation_publication_date=1998; citation_pages=281-286; citation_id=CR144

citation_journal_title=SCN News; citation_title=Zinc deficiency: Is it widespread but underrecognized?; citation_author=R Shrimpton; citation_volume=9; citation_publication_date=1993; citation_pages=23-27; citation_id=CR145

citation_title=Micronutrients assessment at the country level: An international study; citation_publication_date=1990; citation_id=CR146; citation_author=M Sillanpää; citation_publisher=Food and Agriculture Organisation of the United Nations

citation_journal_title=Fertil. Res.; citation_title=Micronutrients and the agroecology of tropical and Mediterranean regions; citation_author=M Sillanpää, P. L. G. Vlek; citation_volume=7; citation_publication_date=1985; citation_pages=151-167; citation_id=CR147

Singh G B 1998 Fertilizer use and sustainability of Indian agriculture. In Nutrient Management for Sustainable Crop Production in Asia. Eds. A E Johnston and J K Syers. pp. 279-289. CAB International.

citation_journal_title=Plant Soil; citation_title=Sulphur and phosphorus transport systems in plants; citation_author=F. W. Smith; citation_volume=232; citation_publication_date=2001; citation_pages=109-118; citation_id=CR149

citation_journal_title=Soil Use Manage.; citation_title=Emissions of N2O and NO associated with nitrogen fertilization in intensive agriculture, and the potential for mitigation; citation_author=K. A. Smith, I. P. McTaggart, H Tsuruta; citation_volume=13; citation_publication_date=1997; citation_pages=296-304; citation_id=CR150

citation_journal_title=Science; citation_title=A permease-oxidase complex involved in highaffinity iron uptake in yeast; citation_author=R Stearman, D. S. Yaun, Y Yamaguchi-Iwai, R. D. Klausner, A Dancis; citation_volume=271; citation_publication_date=1996; citation_pages=1552-1557; citation_id=CR151

citation_journal_title=J. Plant Nutr.; citation_title=Physiological aspect of mugineic acid, a possible phytosiderophore of graminaceous plants; citation_author=S Takagi, K Nomoto, T Takemoto; citation_volume=7; citation_publication_date=1984; citation_pages=469-477; citation_id=CR152

citation_journal_title=Plant Physiol.; citation_title=Cloning two genes for nicotianamine aminotransferase, a critical enzyme in iron acquisition (strategy II) in graminaceous plants; citation_author=M Takahashi, H Yamaguchi, H Nakanishi, T Shioiri, N. K. Nishizawa, S Mori; citation_volume=121; citation_publication_date=1999; citation_pages=947-956; citation_id=CR153

citation_journal_title=Nat. Biotechnol.; citation_title=Enhanced tolerance of rice to low iron availability in alkaline soils using barley nicotianamine aminotransferase genes; citation_author=M Takahashi, H Nakanishi, S Kawasaki, N. K. Nishizawa, S Mori; citation_volume=19; citation_publication_date=2001; citation_pages=466-469; citation_id=CR154

citation_title=Major nutritional constraints to crop production and the soil fertility management strategies in different agroclimatic regions of Asia; citation_inbook_title=Proceedings of the International Potash Institute Colloquium on Potassium in Asia: Balanced Fertilization to Increase and Sustain Agricultural Production; citation_publication_date=1995; citation_pages=43-72; citation_id=CR155; citation_author=H. L. S. Tandon; citation_publisher=International Potash Institute

citation_title=Use of external inputs and the state of efficiency of plant nutrient supplies in irrigated cropping systems in Uttar Pradesh, India; citation_inbook_title=Proceedings of the IFPRI/FAO Workshop on Soil Fertility, Plant Nutrient Management, and Sustainable Agriculture: The future Through 2020; citation_publication_date=1998; citation_id=CR156; citation_author=H. L. S. Tandon; citation_publisher=International Food Policy Research Institute

citation_journal_title=Proc. Natl. Acad. Sci USA; citation_title=Global environmental impacts of agricultural expansion: the need for sustainable and efficient practices; citation_author=D Tillman; citation_volume=96; citation_publication_date=1999; citation_pages=5995-6000; citation_id=CR157

citation_journal_title=Field Crops Res.; citation_title=Productivity and management of rice-wheat cropping systems: issues and challenges; citation_author=J Timsina, D. J. Connor; citation_volume=69; citation_publication_date=2001; citation_pages=93-132; citation_id=CR158

citation_journal_title=Ann. Bot.; citation_title=Differing organic acid exudation patterns explain calcifuge and acidifuge behaviour of plants; citation_author=G Tyler, L Strom; citation_volume=75; citation_publication_date=1995; citation_pages=75-78; citation_id=CR159

citation_title=Human Development Report; citation_publication_date=1999; citation_id=CR160; citation_publisher=Oxford University Press

citation_journal_title=Field Crops Res.; citation_title=Agricultural management of grain legumes: has it led to an increase in nitrogen fixation?; citation_author=C Van Kessel, C Hartley; citation_volume=65; citation_publication_date=2000; citation_pages=165-181; citation_id=CR161

citation_journal_title=Plant Physiol. Biochem.; citation_title=Soil-dependent variability of leaf iron accumulation in transgenic tobacco overexpressing ferritin; citation_author=G Vansuyt, M Mench, J. F. Briat; citation_volume=6; citation_publication_date=2000; citation_pages=499-506; citation_id=CR162

citation_journal_title=Nutr. Cycl. Agroecosyst.; citation_title=Fertilizer-induced nitric oxide emissions from agricultural soils; citation_author=E Veldkamp, M Keller; citation_volume=48; citation_publication_date=1997; citation_pages=69-77; citation_id=CR163

citation_title=Global extent, development and economic impact of acid soils; citation_inbook_title=Plant-Soil Interactions at low pH: Principles and Management; citation_publication_date=1995; citation_pages=5-19; citation_id=CR164; citation_author=H. R. Von Uexküll; citation_author=W Mutuert; citation_publisher=Kluwer Academic Publishers

citation_journal_title=Curr. Opin. Plant Biol.; citation_title=The molecular physiology of ammonium uptake and retrieval; citation_author=N von Wiren, S Gazzarrini, A Gojon, W. B. Frommer; citation_volume=3; citation_publication_date=2000; citation_pages=254-261; citation_id=CR165

citation_journal_title=Plant J.; citation_title=Differential regulation of three functional ammonium transporter genes by nitrogen in root hairs and by light in leaves of tomato; citation_author=N Von Wiren, F. R. Lauter, O Ninnemann, B Gillisen, P Walch-Liu, C Engels, W Jost, W. B. Frommer; citation_volume=21; citation_publication_date=2000; citation_pages=167-175; citation_id=CR166

citation_journal_title=J. Plant Nutr.; citation_title=Iron nutrition in plants: a world overview; citation_author=P. B. Vose; citation_volume=5; citation_publication_date=1982; citation_pages=238-249; citation_id=CR167

citation_journal_title=Exp. Agric.; citation_title=Productivity and profitability of maize + groundnut rotations compared with continuous maize on smallholder farms in Zimbabwe; citation_author=S. R. Waddington, J Karigwindi; citation_volume=37; citation_publication_date=2001; citation_pages=83-98; citation_id=CR168

citation_journal_title=J. Exp. Bot.; citation_title=Iron deficiency stress response in Fe deficiency resistant and susceptable subterranean clover: importance of induced H+ release; citation_author=L. C. Wei, R. H. Loeppert, W. R. Ocumpaugh; citation_volume=48; citation_publication_date=1997; citation_pages=329-346; citation_id=CR169

citation_journal_title=Crit. Rev. Plant Sci.; citation_title=Micronutrient nutrition of plants; citation_author=R. M. Welch; citation_volume=14; citation_publication_date=1995; citation_pages=49-82; citation_id=CR170

citation_title=Importance of seed mineral nutrient reserves in crop growth and development; citation_inbook_title=Mineral Nutrition of Crops: Fundamental Mechanisms and Implications; citation_publication_date=1999; citation_pages=205-226; citation_id=CR171; citation_author=R. M. Welch; citation_publisher=Haworth Press

citation_journal_title=Field Crops Res.; citation_title=A new paradigm for world agriculture: meeting human needs. Productive, sustainable, nutritious; citation_author=R. M. Welch, R. D. Graham; citation_volume=60; citation_publication_date=1999; citation_pages=1-10; citation_id=CR172

citation_journal_title=Food Nutr. Bull.; citation_title=A new paradigm for world agriculture: productive, sustainable, nutritious, healthful food systems; citation_author=R. M. Welch, R. D. Graham; citation_volume=21; citation_publication_date=2000; citation_pages=361-366; citation_id=CR173

citation_journal_title=Annu. Rev. Plant Physiol. Plant Mol. Biol.; citation_title=Transporters responsible for the uptake and partitioning of nitrogenous solutes; citation_author=L. E. Williams, A. J. Miller; citation_volume=52; citation_publication_date=2001; citation_pages=659-688; citation_id=CR174

citation_journal_title=Outlook Agric.; citation_title=Soil fertility maintenance and food crop production in semi-arid West Africa: Is reliance on manure a sustainable strategy?; citation_author=T. O. Williams, J. M. Powell, S Fernandez-Rivera; citation_volume=24; citation_publication_date=1995; citation_pages=43-47; citation_id=CR175

citation_journal_title=J. Agric. Sci.; citation_title=Measurement of the acid neutralising capacity of agroforestry tree promising added to tropical soils; citation_author=M. T. C. Wong, P Gibbs, S Nortcliff, R. S. Swift; citation_volume=134; citation_publication_date=1999; citation_pages=269-276; citation_id=CR176

citation_journal_title=Exp. Agric.; citation_title=Factor productivity trends in a rice-wheat cropping system under long-term use of chemical fertilizers; citation_author=R. L. Yadav; citation_volume=34; citation_publication_date=1998; citation_pages=1-18; citation_id=CR177

citation_journal_title=Field Crops Res.; citation_title=Rice-wheat cropping system: assessment of sustainability under green manuring and chemical fertilizer inputs; citation_author=R. L. Yadav, B. S. Dwivedi, P. S. Pandey; citation_volume=65; citation_publication_date=2000; citation_pages=15-30; citation_id=CR178

citation_journal_title=Field Crops Res.; citation_title=Yield trends, and changes in soil organic-C and available NPK in a long-term rice-wheat system under integrated use of manures and fertilizers; citation_author=R. L. Yadav, B. S. Dwivedi, K Prasad, O. K. Tomar, N. J. Shurpali, P. S. Pandey; citation_volume=68; citation_publication_date=2000; citation_pages=219-246; citation_id=CR179

citation_journal_title=Physiol. Plant.; citation_title=Aluminium tolerance is achieved by exudation of citric acid from roots of soybean (Glycine max); citation_author=Z. M. Yang, M Sivaguru, W. J. Horst, H Matsumoto; citation_volume=110; citation_publication_date=2000; citation_pages=72-77; citation_id=CR180

citation_journal_title=J. Plant Nutr.; citation_title=Effect of different zinc application methods on grain yield and zinc concentration in wheat grown on zincdeficient calcareous soils in Central Anatolia; citation_author=A Yilmaz, H Ekiz, B Torun, I Gültekin, S Karanlik, S. A. Bagci, I Cakmak; citation_volume=20; citation_publication_date=1997; citation_pages=461-471; citation_id=CR181

citation_journal_title=J. Nutr.; citation_title=Iron deficiency: contemporary scientific issues and international programmatic approaches; citation_author=R Yip; citation_volume=124; citation_publication_date=1994; citation_pages=1479-1490; citation_id=CR182

citation_journal_title=Proc. Natl. Acad. Sci. USA; citation_title=The yeast ZRT1 gene encodes the zinc transporter protein of a high-affinity uptake system induced by zinc limitation; citation_author=H Zhao, D Eide; citation_volume=93; citation_publication_date=1996; citation_pages=2454-2458; citation_id=CR183

citation_journal_title=J. Biol. Chem.; citation_title=The ZRT2 gene encodes the low affinity zinc transporter in Saccharomyces cerevisiae ; citation_author=H Zhao, D Eide; citation_volume=271; citation_publication_date=1996; citation_pages=23203-23210; citation_id=CR184