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Environmental and genetic control of morphogenesis in crops: towards models simulating phenotypic plasticity
CSIRO Publishing - Tập 56 Số 11 - Trang 1289 - 2005
Michaël Dingkuhn, Delphine Luquet, Bénédicte Quilot‐Turion, Philippe de Reffye
As molecular biologists are realising the importance of physiology in understanding functional genomics of quantitative traits, and as physiologists are realising the formidable prospects for improving their phenotypic models with information on the underlying gene networks, researchers worldwide are working on linked physiological–genetic models. These efforts are in their early methodo...... hiện toàn bộ
Photosynthetic dysfunction and in vivo changes in chlorophyll a fluorescence from manganese-deficient wheat leaves
CSIRO Publishing - Tập 36 Số 2 - Trang 157 - 1985
PE Kriedemann, RD Graham, JT Wiskich
Leaves on wheat plants growing in manganese-deficient media showed much higher constant-yield fluorescence (Fo) but greatly reduced variable fluorescence (Fv). Higher Fo was symptomatic of a stronger overall emission which derived from functional changes within photosynthetic membranes and was not simply attributable to differences in leaf reflectivity of wavelengths relevant to fluorescen...... hiện toàn bộ
The analysis of adaptation in a plant-breeding programme
CSIRO Publishing - Tập 14 Số 6 - Trang 742 - 1963
K. W. Finlay, GN Wilkinson
The adaptation of barley varieties was studied by the use of grain yields of a randomly chosen group of 277 varieties from a world collection, grown in replicated trials for several seasons at three sites in South Australia. For each variety a linear regression of yield on the mean yield of all varieties for each site and season was computed to measure variety adaptation. In these calculat...... hiện toàn bộ
Phosphorus export at the paddock, farm-section, and whole farm scale on an irrigated dairy farm in south-eastern Australia
CSIRO Publishing - Tập 56 Số 1 - Trang 1 - 2005
Kirsten Barlow, David Nash, Rodger B. Grayson
Phosphorus (P) exported from agricultural land contributes to the eutrophication of inland water systems. Although P export has been extensively researched at the paddock scale, our understanding of farm-scale export is limited. This paper presents the results of a 3-year monitoring project that investigated P export at the paddock, farm-section, and whole farm scales on an irrigated dair...... hiện toàn bộ
Ecosystem processes in semiarid grasslands. I. Primary production and water use of two communities possessing different photosynthetic pathways
CSIRO Publishing - Tập 29 Số 4 - Trang 773 - 1978
EK Christie
Above- and below-ground productivity and estimated evapotranspiration rates of a C3 native grassland and a sown C4 buffel grassland community growing on sandy red earth soils at Charleville were studied over a 12-month period. Resistance to water vapour transfer from leaves of both species was measured in the field and glasshouse. Although buffel grass had the highest maximum above-ground ...... hiện toàn bộ
The histotropic phase of the nematode parasite, Ostertagia circumcinta.
CSIRO Publishing - Tập 5 Số 1 - Trang 130 - 1954
R. I. Sommerville
The histotropic phase of Ostertagia circumcincta in the abomasal mucosa of the sheep has been investigated. Larvae were found to enter the gastric pits and glands and there pass the third ecdysis, three days after oral administration to the host. Some of these larvae failed to grow after ecdysis, and were found in the mucosa as long as three months from the date of infestation. Other lar...... hiện toàn bộ
Thermal status of sheep at pasture in western New South Wales
CSIRO Publishing - Tập 22 Số 5 - Trang 797 - 1971
GD Brown
The thermal status of three unrestrained rams at pasture was studied for a period of 5 days during March in central western New South Wales. A temperature telemetry system was used to measure rectal temperatures, skin surface and subcutaneous temperatures on the mid back, and subcutaneous temperatures of the scrotum of each ram. Rectal temperatures of 40�C and above were recorded for all r...... hiện toàn bộ
Distance between food and water supply and its effect on drinking frequency, and food and water intake of Merino and Border Leicester sheep
CSIRO Publishing - Tập 22 Số 2 - Trang 283 - 1971
Victor R. Squires, AD Wilson
The walking and drinking behaviour of Merino and Border Leicester wethers was compared in summer 1968 when a diet containing 15 % sodium chloride was fed at points that were separated from the water supply by distances of up to 5.6 km. All sheep maintained two journeys daily to water until the distance between food and water reached 4.0 km. At this point Merino sheep drank three times ever...... hiện toàn bộ
Effects of sheep grazing Astrebla grassland in central western Queensland. 1. Effects of grazing pressure and livestock distribution
CSIRO Publishing - Tập 31 Số 4 - Trang 797 - 1980
D. M. Orr
The effects of grazing pressure on plant responses and livestock distribution in Astrebla grassland were determined from paddocks subject to commercial grazing by sheep at light, medium or heavy grazing pressure. Increased grazing pressure reduced the projected foliage cover of Astrebla spp., the basal area of which was similar under light and medium grazing pressure, and was reduced under...... hiện toàn bộ
Radiation use efficiency increases when the diffuse component of incident radiation is enhanced under shade
CSIRO Publishing - Tập 49 Số 4 - Trang 665 - 1998
K. D. Healey, Graeme Hammer, K. G. Rickert, M. P. Bange
Theoretical analyses have shown the radiation use efficiency of maize, soybean, and peanut to increase with a decrease in the level of incident radiation and an increase in the proportion of diffuse radiation. This study compared the growth and radiation use efficiency of Panicum maximum cv. Petrie (green panic) and Bothriochloa insculpta cv. Bisset (creeping bluegrass) beneath shading tr...... hiện toàn bộ
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