Effects of organic and mineral fertilizer inputs on maize yield and soil chemical properties in a maize cropping system in Meru South District, Kenya

Adiel RK (2004) Assessment of on-farm adoption potential of nutrient management strategies in Chuka division, Meru south, Kenya. MSc Thesis, Kenyatta University, Kenya

Antil RS, Lovel RD, Hatch DJ, Jarvis SC (2001) Mineralization of nitrogen in permanent pastures amended with fertilizer or dung. Biol Fertil Soils 33:132–138

Bekunda AM, Bationo A, Ssali H (1997) Soil fertility management in Africa: a review of selected research trials. In: Buresh RJ, Sanchez PA, Calhoun F (eds) Replenishing soil fertility in Africa. Soil Science Society of America, Madison, WI, Special publication No. 51

Chesson A (1997) Plant degradation by ruminants: parallels with litter decomposition in soils. In: Cadisch G, Giller K (eds) Driven by nature: plant litter quality and decomposition. CAB International, Wallingford, pp 47–66

CIMMYT (1988) From agronomic data to farmer recommendation: an economics training manual. Completely revised edition. Mexico, DF

Donovan G, Casey (1998) Soil fertility management in Sub-Saharan Africa. World Bank. Technical Paper 408

Eghball B (2002) Soil properties as influenced by phosphorus and nitrogen based manure and compost applications. Agron J 94:128–135

Eghball B, Power JF (1999) Phosphorus and nitrogen-based manure and compost application: corn production and soil phosphorus. Soil Sci Soc Am J 63:895–901

Fertilizer Use Recommendation Project (FURP) (1987) Description of first priority trial site in the various Districts. Final report, vol 24. Embu District. National Agricultural Research Laboratories, Nairobi, Kenya

Gao G, Chang C (1996) Changes in CEC and particle size distribution of soils associated with long-term annual application of cattle feed lot manure. Soil Sci 161:115–120

Hue NV, Amien I (1989) Aluminium detoxification with green manures. Commun Soil Sci Plant J 20:1499–1511

International Centre for Research in Agroforestry (ICRAF) (1993) Annual report for 1992. Nairobi, Kenya

International Centre for Research in Agroforestry (ICRAF) (1995) Laboratory Methods for Soil and Plant Analysis, Version 1.1, Nairobi

Jaetzold R, Schmidt H (1983) Farm management handbook of Kenya. Natural conditions and farm information, vol 11/C. East Kenya. Ministry of Agriculture, Kenya

Jama B, Swinkles RA, Buresh RJ (1997) Agronomic and economic evaluation of organic and inorganic sources of phosphorus for maize. Agron J 89:597–604

Kang BT (1993) Alley cropping: past achievements and future directs. Agrof Syst 23:141–155

Kapkiyai JJ, Karanja NK, Woomer P, Qureshi JN (1998) Soil organic carbon fractions in a long-term experiment and the potential for their use as a diagnostic assays in highland farming systems of central Kenya. Afr Crop Sci J 6:19–28

Kihanda FM (1996) The role of farmyard manure in improving maize production in the sub-humid Central highlands of central Kenya. PhD Thesis, UK

Lehmann J, Schroth G, Zech W (1995) Decomposition and nutrient release from leaves, twigs and roots of three alley-cropped tree legumes in Central Togo. Agrof Syst 29:21–36

Mugendi DN, Nair PKR, Mugwe JN, O’Neill MK, Woomer PL (1999) Calliandra and Leucaena alley cropped with maize. Part 1. Soil fertility changes and maize production in the sub-humid highlands of Kenya. Agrof Syst 46:39–50

Mutuo PK, Mukalama JP, Agunda J (2000) On-farm testing of organic and inorganic phosphorous source on maize in Western Kenya. In: The biology and fertility of tropical soils, TSBF report, p 22

Niang AI, Githumbi SM, Amadalo BA (1996) The potential of improved fallow on crop productivity enhancement in the highlands of Western Kenya. In: Muga JO (ed) Proceedings of the first national agroforestry conference, KEFRI Headquarters Muguga, Nairobi, Kenya, 25–29 March

Nziguheba G, Palm CA, Buresh RJ, Smithson PC (1998) Soil phosphorus fractions and adsorption as affected by organic and inorganic sources. In: The biology and fertility of tropical soils, TSBF report, p 22

Nziguheba G, Merckx R, Palm CA, Mutuo P (2002) Combining Tithonia diversifolia and fertilizers for maize production in a phosphorus deficient soil in Kenya. Agrof Syst 55:165–174

Palm CA, Myers RJK, Nandwa SM (1997) Organic–inorganic nutrient interactions in soil fertility replenishment. In: Buresh RJ, Sanchez PA, Calhoun F (eds) Replenishing soil fertility in Africa. Soil Science Society of America, Madison, WI, pp 193–218, Special publication No. 51

Palm CA, Gachengo CN, Delve RG, Candisch G, Giller K (2001) Organic inputs for soil fertility management in tropical agroecosystem: application of organic resource database. Agric Ecosyst Environ 83:27–42

Sanchez PA, Shepherd KD, Soule MJ, Place FM, Buresh RJ, Izac AMN, Mokwunje AU, Kwesiga FR, Ndiritu CG, Woomer PL (1997) Soil fertility replenishment in Africa: an investment in natural resources capital. In: Buresh RJ, Sanchez PA, Calhoun F (eds) Replenishing soil fertility in Africa. Soil Science Society of America, Madison, WI, Special publication No. 51

Schlegel AT (1992) Effect of composted manure on soil chemical properties and nitrogen use by grain sorghum. J Prod Agric 5:153–157

Smaling E (1993) Soil nutrient depletion in sub-Saharan Africa. In: Van Reuler H, Prins W (eds) The role of plant nutrients for sustainable food crop production in sub-Saharan Africa. VKP, Leidschendam, The Netherlands

Tisdale SL, Nelson WL, Beaton JD, Havlin JL (1993) Soil fertility and fertilizers, 5th ed. Macmillan Publ. Co., New York

Werner MW (1997) Soil quality characteristics during conversion to organic orchard management. Appl Soil Ecol 5:151–167