You are here

water balance

Catalogue: GRDC 2014 Research Summaries
Farmers throughout southern Australia continue to seek improved conservation farming strategies, including increased levels of residue retention, reduced soil disturbance, and greater rotation diversity... CSIRO has been monitoring changes in the water balance on the trial since then, and so far we have demonstrated that early crop termination (as part of a cover cropping practice) can increase the risk of dryland salinity under some situations... Increased levels of residue retention have had little impact on the water balance in the short term (6 years), and so farmers can adopt this practice confident that there will be no negative short-term environmental impact due to changes in the water balance...
Related categories:

Catalogue: GRDC Final Reports
Experimental data are presented that show that fallow management, in particular that of weeds and residue cover, not only affects the amount of water stored or lost during the summer, but also has an effect on the loss of water past the root zone during the subsequent growing season... Model simulations capture these effects and a scenario analysis indicates that retaining residues past sowing increases the risk of deep water loss relatively rapidly... The effects of different residue management will be greater in wetter summers...
Related categories:
Catalogue: GRDC Updates
The core objectives of the project are to increase the return per unit of applied water and reduce the environmental impact of irrigation in the project area through the roll out of precision irrigation systems that allow the irrigators to more precisely match water application to crop water needs... The project will incorporate: soil moisture and climate sensors to monitor the water balance in their soils and crops and make decisions about when to irrigate and how much and at what rate to apply water to their fields; and control systems and storages to provide users with greater control over the rate and timing of irrigation applications... CICL proposes to overcome these barriers by: providing a significant up-front cost subsidy for the deployment of the infrastructure for precision irrigation systems; avoiding the need for individual irrigators to acquire, deploy and maintain the technologies by offering a full service precision irrigation package that will be deployed and maintained by CICL and partner organisations; providing the near on-demand water supply service to the farm gate that is required in order to precisely match water; and most importantly, training and educating irrigators in the use of precision irrigation technologies and providing water balance and crop information in a user friendly format...
Related categories:
Catalogue: GRDC Updates (North)
Grain yields can be increased through greater transpiration efficiency (TE), a measure of the efficiency with which water is exchanged for carbon dioxide during photosynthesis... Oil composition can be compromised and lead to a change in fatty acid profiles if the seed is harvested when too moist, the seed has been excessively thrashed, admixture / moisture and disease levels are too high or the temperatures in your silo reach 35 C plus for more than 3 or 4 days in a row... For the reasons above, we need a cropping/pasture rotation..
Related categories:
Catalogue: GRDC Updates (South)
Grain yields can be increased through greater transpiration efficiency (TE), a measure of the efficiency with which water is exchanged for carbon dioxide during photosynthesis... Oil composition can be compromised and lead to a change in fatty acid profiles if the seed is harvested when too moist, the seed has been excessively thrashed, admixture / moisture and disease levels are too high or the temperatures in your silo reach 35 C plus for more than 3 or 4 days in a row... For the reasons above, we need a cropping/pasture rotation..
Related categories:
Catalogue: GRDC Updates (North)
Oil composition can be compromised and lead to a change in fatty acid profiles if the seed is harvested when too moist, the seed has been excessively thrashed, admixture / moisture and disease levels are too high or the temperatures in your silo reach 35 C plus for more than 3 or 4 days in a row... People in some areas have very low levels of awareness that salinity is a problem, and report a low level of salinity... The chemical fertility of soil is only one group of factors that need to be considered when producing a good crop and a good income...
Related categories:
Catalogue: GRDC Updates (South)
Oil composition can be compromised and lead to a change in fatty acid profiles if the seed is harvested when too moist, the seed has been excessively thrashed, admixture / moisture and disease levels are too high or the temperatures in your silo reach 35 C plus for more than 3 or 4 days in a row... People in some areas have very low levels of awareness that salinity is a problem, and report a low level of salinity... The chemical fertility of soil is only one group of factors that need to be considered when producing a good crop and a good income...
Related categories:
Catalogue: GRDC Publications
Soil microrganisms also impact on the physical properties of soils including their capacity to hold water... An on-going output will be the coordination of review workshops and reporting processes to ensure that adequate resourcing, integration and consistency measures are being applied across all projects and new opportunities are identified... The major foci of this project are to screen and identify elite diseasesuppressive microbes for cereals and nodulation enhancing beneficial microbes for legumes...
Related categories:
Catalogue: GRDC Updates
Graph two is for a heavy clay Black Vertosol from Spring Ridge; results show the plant available water capacity (PAWC) is 272mm... Rooting depth should be determined through perusal of physical and chemical data and the physical observation of roots and water extraction through soil coring and/or electronic monitoring... Simulation of water storage using the >100 year climate record shows that a short fallow from wheat (assuming a dry soil profile at harvest in November of the previous year) results in a 50% chance of at least 110mm (range of 0-300mm) of water being available for an April planting at Spring Ridge and 80mm (range of 0-180mm) at Nyngan (Figure 8)...
Related categories:
Catalogue: GRDC Final Reports
Farmers across southern Australia are adopting no-till farming systems that have potential for greater water use efficiency (WUE) and greater risk of drainage... The strong links established between CSIRO, WANTFA and the Department of Agriculture and Food Western Australia (DAFWA) are a very useful outcome for further research in this area... The links established between CSIRO, DAFWA and WANTFA are strong and should be maintained to ensure rigorous research and rapid adoption...
Related categories:

Pages