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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
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
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
The Avon River Basin in 2050: scenario planning in the Western Australian Wheatbelt
CSIRO Publishing - Tập 56 Số 6 - Trang 563 - 2005
Michael H. O’Connor, Mike McFarlane, James Fisher, Donald G. MacRae, EC Lefroy
Scenario planning was used to identify issues and drivers of change that are relevant to community efforts to improve regional prospects in the Western Australian Wheatbelt. The region, some 20 million hectares in area, is under pressure to respond to a variety of environmental (salinity, erosion, acidification, biodiversity decline), economic (declining agricultural terms of trade), and...... hiện toàn bộ
Changes in organic matter and pH in a podzolic soil as influenced by subterranean clover and superphosphate
CSIRO Publishing - Tập 8 Số 2 - Trang 179 - 1957
CH Williams, CM Donald
A further investigation has been made on soils examined by Donald and Williams (1955) in a survey of the influence of superphosphate and subterranean clover (Trifolium subterraneum L.) on podzolic soils formed on granodiorite in the Crookwell district of New South Wales. The soil organic matter was found to have approximately constant proportions of carbon, nitrogen, sulphur, and phosphor...... hiện toàn bộ
Crop responses to lime in long-term pasture-crop rotations in a high rainfall area in south-eastern Australia
CSIRO Publishing - Tập 52 Số 3 - Trang 329 - 2001
Guangdi Li, K. R. Helyar, Mark Conyers, B. R. Cullis, P. D. Cregan, R. P. Fisher, L. J. C. Castleman, Graeme Poile, C. M. Evans, B. D. Braysher
A long-term trial, known as ‘managing acid soils through efficient rotations’ (MASTER), commenced in 1992 to develop and demonstrate a cropping system that is economically viable on the highly acid soils of the traditional permanent pasture region in south-eastern Australia, so that their fertility is sustained or improved. There were 2 permanent pasture systems and 2 pasture–crop rotatio...... hiện toàn bộ
Pasture and sheep responses to lime application in a grazing experiment in a high-rainfall area, south-eastern Australia. I. Pasture production
CSIRO Publishing - Tập 57 Số 10 - Trang 1045 - 2006
Guangdi Li, K. R. Helyar, S. J. Welham, Mark Conyers, L. J. C. Castleman, R. P. Fisher, C. M. Evans, B. R. Cullis, P. D. Cregan
‘Managing Acid Soils Through Efficient Rotations (MASTER)’ is a long-term pasture–crop rotation experiment commenced in 1992. One of the objectives was to demonstrate the extent of crop, pasture, and animal responses to lime on a typical acidic soil in the 500–800 mm rainfall zone in south-eastern Australia. Two types of pastures (perennial v. annual pastures) with or without lime applic...... hiện toàn bộ
Reducing rumen methane emissions through elimination of rumen protozoa
CSIRO Publishing - Tập 50 Số 8 - Trang 1321 - 1999
R. S. Hegarty
Methanogens living on and within rumen ciliate protozoa may be responsible for up to 37% of the rumen methane emissions. In the absence of protozoa, rumen methane emissions are reduced by an average of 13% but this varies with diet. Decreased methane emissions from the protozoa-free rumen may be a consequence of: (1) reduced ruminal dry matter digestion; (2) a decreased methanogen populat...... hiện toàn bộ
Studies on the number of ewes joined per ram for flock matings under paddock conditions. I. Mating behaviour and fertility
CSIRO Publishing - Tập 19 Số 6 - Trang 1029 - 1968
RJ Lightfoot, Jac Smith
In a series of six experiments rams were joined either singularly or in groups to varying numbers of ewes so that the number of ewes joined per ram varied between 25 and 100. Under the conditions of these experiments, decreasing the number of ewes joined per ram was associated with more rams serving each oestrous ewe, a greater proportion of ewes served during the first 2 weeks of joining,...... hiện toàn bộ
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