You are here

soil information

Catalogue: GRDC Updates (West)
The relative effectiveness was calculated at the effectiveness of N at a depth compared with the effectiveness of N in the top-soil (0-0.2 m layer)... (A assuming Bulk density of 1.5), B % of sites measured to that depth not of the 474 cores).. The trials necessarily included whatever deep soil N the crops could access and so the responses will be weighted by that contribution from deep N. For tools such as Yield Prophet , the N at depth is usually measured and included in the model the roots for most of the soils in Yield Prophet are set to unconstrained growth...
Related categories:
Catalogue: GRDC Updates
The relative effectiveness was calculated at the effectiveness of N at a depth compared with the effectiveness of N in the top-soil (0-0.2 m layer)... The roots are still able to grow to maximum depth in most years but they are delayed in the time at which they reach a certain depth and have reduced effectiveness at taking up deep N. The combination of this plus leaching in the sand and loam and/or higher rainfall location has reduced the relative effectiveness to 20-40% in the 0.2-0.4 m layer and less than 20% in the deeper layers... The trials necessarily included whatever deep soil N the crops could access and so the responses will be weighted by that contribution from deep N. For tools such as Yield Prophet , the N at depth is usually measured and included in the model the roots for most of the soils in Yield Prophet are set to unconstrained growth...
Related categories:
Catalogue: GRDC Final Reports
Changes to farming practices and resultant improvements to water storage efficiency, coupled with the high variability in climate, have increased demand for improved understanding of soil water management in agriculture... Investigation of technologies to expedite measurement of soil water has resulted in the development of the tools, SoilMapp and Soil Water Express and improved understanding of the potential for electromagnetic induction (EMI) and spectrometry to contribute to soil water management... If the accuracy of decision support tools is to be increased, there is a continuing need for the characterisation of soils at the paddock or broader spatial scales to fill existing data 'black holes'...
Related categories:
Catalogue: GRDC Research Summaries
Over recent years soil water has become an increasingly important component of crop management in Australia?s broadacre cropping systems... This project builds on previous research (GRDC CSA00011) providing more advanced soil water management training to agricultural consultants and farmers, expanding the regional characterisation of soils for PAWC and assessing technologies for the rapid characterisation and monitoring of soil water resources on-farm... The development of the Soil Water Express, provides users with the potential to undertake a rapid, but less accurate, prediction of PAWC based on locally derived soil data and functions developed from information contained in the APSoil database...
Related categories:
Catalogue: GRDC Final Reports
Whilst managing the water balance of crops is one of the most critical issues in Australian dryland agriculture, there has been limited information available to farm managers that allows the productive capacity of soils to be considered when making crop management decisions... Evaluation of project activities showed that whilst growers were interested in soil water management and were prepared to use Yield Prophet as a tool for in-season crop management, they generally relied on their consultants to undertake the pre-season monitoring and input of data... Whilst the project has had a major influence in promoting the value of soil water in management, there is an on-going need for higher level training as well as the development of increased capacity in soil characterisation and monitoring through the exploration and adoption of new technologies...
Related categories:
Catalogue: Ground Cover
The recently developed iPad application SoilMapp uses GPS to identify soil water-holding information for specific locations... Mr Dalgliesh, who has worked on the APSIM (Agricultural Production Systems sIMulator) model for more than 20 years, says experience shows that increased soil information increases the chances of achieving a season's optimum yields and profits... Mr Dalgliesh says the challenge is where current research comes in. Information on the water-holding capacity of an additional 245 soils has been added to the APSoil database ( www.apsim.info/Wiki/APSoil.ashx ), bringing the total to more than 900...
Related categories:
Catalogue: GRDC Research Summaries
Over recent years soil water has become an increasingly important component of crop management in Australia?s broadacre cropping systems... The development of the Soil Water Express, provides users with the potential to undertake a rapid, but less accurate, prediction of PAWC based on locally derived soil data and functions developed from information contained in the APSoil database... Whilst in-situ electronic monitoring devices including NIR and capacitance probes provide an adequate picture of soil water in rigid soils, they were found to be inappropriate for shrink/swell soils where cracking and soil movement interfere with accurate recording...
Related categories:
Catalogue: Ground Cover
Estimates show the world is losing 75 to 100 billion tonnes of agricultural and pastoral soil annually - and new soils require thousands of years to form... Professor Naidu says such rates of degradation risk exhausting the world's food-producing soils within two to three generations... The mobile-device technology was designed to deliver detailed scientific information on soils directly into the hands of growers, rural consultants, agronomists and potentially other soil enthusiasts such as real estate agents and keen bushwalkers...
Related categories: