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water uptake

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Catalogue: GRDC Media
Ravensthorpe grower Bevan Tuckett with an instruments station being used to map different soil types for their responsiveness to nitrogen treatments and their water-holding capacity... A SMP is permanently installed and works by sensing moisture in close proximity (about a 10cm radius) to the probe, recording this information and sending it via a cable to a telemetry unit and data logger... More than 50 SMPs have been installed in recent years across WA's broadacre cropping areas in a range of trials supported by GRDC, CSIRO, the Department of Agriculture and Food WA (DAFWA), advisers, grower groups and other industry stakeholders...
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Catalogue: GRDC Final Reports
Transient salinity in soils, characterised by high concentration of salts in the subsoil, varies with depth and changes throughout the season in response to rainfall, surface evaporation, water use by vegetation and the leaching fraction (hydraulic conductivity) of the clay layer... Experiments in our project have shown that transient salinity (accumulation of salt in root zone layers, not influenced by watertable) affects crop yield and growth in dry land regions mainly by reducing water use efficiency of crops through osmotic effect, although toxic effects of individual ions such as sodium can also cause yield reduction... The results indicate that gypsum application improves leaching of salts...
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Catalogue: GRDC Media
Wheat crops on the deep ripped plots have already grown roots and accessed water to a depth of 40cm below the soil surface - a much deeper level compared with the unripped plots... "In coming weeks, roots in the ripped plots may access soil water below 40cm and these crops could produce yields up to 0.5 tonnes per hectare greater than the crops on the untreated plots," CSIRO researcher Phil Ward said... "During winter, there was virtually no water uptake at 20 to 40cm in the untreated soils, but there was significant water uptake and root growth at this depth in the ripped plots," Dr Ward said...
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Catalogue: GRDC Media
Crops on deep ripped soils show promise in dry season.. Wheat crops on the deep ripped plots have already grown roots and accessed water to a depth of 40cm below the soil surface - a much deeper level compared with the unripped plots... "In coming weeks, roots in the ripped plots may access soil water below 40cm and these crops could produce yields up to 0.5 tonnes per hectare greater than the crops on the untreated plots," CSIRO researcher Phil Ward said...
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Catalogue: GRDC Research Summaries
" Delivery of Technical Workshops to Enhance Industry Knowledge - Crop Growth Researcher's Name: NigelWilhelm Organisation: Low Rainfall Collaboration Project, through Central West FS group as the contracting body Email: Nigel... A thorough understanding of key processes underlying plant growth and water uptake is essential in order to better manage the impact of various influences on crop growth, such as nutrition, disease, variety, soil moisture, time of seeding, likely end use outcomes (feed vs hay vs grain) and harvest conditions... Single day workshops will be held with each of five low rainfall farming systems groups across south eastern Australia...
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Catalogue: GRDC Final Reports
The data consisted of wheat (947 or 347-N, 346-P, 182-K and 72-S), lupins (506 or 444-P, 32-K and 30-S) and canola (439 or 138-N, 31-P, 138-K and 132-S) fertiliser response curves... Critical levels and confidence levels were successfully defined for P with wheat, lupins and canola and K for wheat, lupins and canola using the 0-10cm sampling layer - with results given in mg/kg and data grouped into soil types... An evaluation of this method of calculating soil solution P illustrates P runoff predictions are more sensitive to increases in soil P tests than the previous method of using a constant extraction coefficient...
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Catalogue: Ground Cover
New tools give breeders a creative edge.. "During the development of this germplasm we saw all the deleterious traits you would expect to come through from the wild parent - things like shattering, head loss, staggered germination, barbed awns - all sorts of unfriendly things," Associate Professor Eglinton says... WI4483 has been promoted into the 2010 National Variety Trials...
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Catalogue: GRDC Research Summaries
" Delivery of Technical Workshops to Enhance Industry Knowledge - Crop Growth Researcher's Name: NigelWilhelm Organisation: Low Rainfall Collaboration Project, through Central West FS group as the contracting body Email: Nigel... A thorough understanding of key processes underlying plant growth and water uptake is essential in order to better manage the impact of various influences on crop growth, such as nutrition, disease, variety, soil moisture, time of seeding, likely end use outcomes (feed vs hay vs grain) and harvest conditions... Single day workshops will be held with each of five low rainfall farming systems groups across south eastern Australia...
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Catalogue: Ground Cover
Pressure continues to mount on cereal pre-breeders to find ways to quickly increase the yield potential of staple crops - for global food security and for the viability of commercial growers.. Yield is back on the agenda - the need to get more grain from each cereal plant grown... Other studies of yield potential follow a similar pattern, including gains of: 0.3 per cent annually in irrigated spring wheat based on experiments in the Yaqui Valley in Mexico in 2005 (although the rate halves in Mexico's warmer Tlaltizap n and has shown little tendency to increase in cultivars released after 1966); and 0.68 and 0.75 per cent annually in irrigated winter wheats based on historic set studies from different periods in the main winter wheat regions in China...
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