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soil function

Catalogue: GRDC Research Summaries
Based on the data, a number of biochars will be selected for detailed field and laboratory-based experiments to assess the different aspects of the biochar on crop nutrition and associated soil properties... Organic manures and green waste materials show promise in augmenting the use of mineral fertilisers in cropping systems, whilst the use of biochar may have a role in sequestering carbon and improving the nutrient retention capacity of soils... The project (in collaboration with project CSO00041, Evelyn Krull CSIRO) uses a combination of fundamental and applied experiments to assess the potential fit of biochar into current and future farming systems with a particular focus on plant nutrient acquisition...
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Catalogue: GRDC 2014 Research Summaries
Australian grain growers have progressively adopted a number of best management practices in order to minimise soil tillage, which is one of the main causes of soil erosion, soil compaction and soil organic matter loss... Little is known about how the increased application of herbicides affects soil biota and soil functions that sustain crop growth and ecosystem services such as crop residue turnover, water holding capacity, soil carbon storage and nutrient cycling... The project will address current knowledge gaps regarding the impact of herbicides on soil biota in all three growing regions of the Australian grains industry. The project objectives include determining the effects of different herbicides on not only soil biological communities and biodiversity, but also quantifying their effects on soil functions critical to ecosystem health...
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Catalogue: Ground Cover
Long-term trial shows the benefits of soil carbon.. Western Australian researchers and grower groups are investigating the benefits and pitfalls of a range of strategies to boost soil organic carbon (SOC) across the state's cropping areas... Dr Hoyle says the long-term trials indicate that by increasing organic matter inputs, retaining stubble, minimising soil disturbance and optimising plant productivity, the loss of SOC from cropping systems can be slowed or SOC can slowly increase (but this is likely to occur over many decades)...
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Catalogue: Ground Cover
Long-term trial shows the benefits of soil carbon.. Western Australian researchers and grower groups are investigating the benefits and pitfalls of a range of strategies to boost soil organic carbon (SOC) across the state's cropping areas... Dr Hoyle says the long-term trials indicate that by increasing organic matter inputs, retaining stubble, minimising soil disturbance and optimising plant productivity, the loss of SOC from cropping systems can be slowed or SOC can slowly increase (but this is likely to occur over many decades)...
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Catalogue: GRDC Publications
Soil organic matter contributes to a range of biological, chemical and physical properties of soil and is essential for soil health... Soils rarely reach their theoretical potential for organic matter storage (see Figure 1.7)... In soils with low clay content the amount of humus and resistant soil organic matter is increasingly important to nutrient exchange because its large surface area gathers (adsorbs) cations from the soil solution, holding nutrients that would otherwise leach...
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Catalogue: GRDC Publications
Overall, soil CEC and SOC content was greatest in the 0.2 and 0.2-2 m fraction, indicating that size, and probably type, of SOM influenced CEC... Kaiser et al. (2003) found that soils with a high content of black carbon showed increased sorption ability compared with plant- and microbial-derived SOM... Addition of organic amendments can increase P availability to plants by decreasing the P adsorption capacity of soils...
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Catalogue: GRDC Publications
Increasing organic matter (and organic carbon) in soil requires a balance of carbon and nitrogen as well as other nutrients... Soils rarely reach their theoretical potential for organic matter storage (see Figure 1.7)... In soils with low clay content the amount of humus and resistant soil organic matter is increasingly important to nutrient exchange because its large surface area gathers (adsorbs) cations from the soil solution, holding nutrients that would otherwise leach...
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Catalogue: GRDC Updates
The objective of the paper is to examine the relative contribution of soil biological attributes, including organic carbon to crop production using Western Australian (WA) farming systems as an example... Identifying Soil Constraints to Crop Production Environmental indicators are measures of physical, chemical, biological or socio-economic characteristics which reflect changes in processes, properties or function - with different attributes required for different land uses... In the trial, the microbial biomass (measured to 30 cm depth) contained the equivalent of 192 kg/ha urea (stubble retained) and 146 kg/ha urea (stubble burnt) - a significant source of potentially plant available N. These results illustrate that regular inputs of organic residues promote both a larger but also more active microbial community...
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Catalogue: GRDC Research Summaries
Based on the data, a number of biochars will be selected for detailed field and laboratory-based experiments to assess the different aspects of the biochar on crop nutrition and associated soil properties... Organic manures and green waste materials show promise in augmenting the use of mineral fertilisers in cropping systems, whilst the use of biochar may have a role in sequestering carbon and improving the nutrient retention capacity of soils... The project (in collaboration with project CSO00041, Evelyn Krull CSIRO) uses a combination of fundamental and applied experiments to assess the potential fit of biochar into current and future farming systems with a particular focus on plant nutrient acquisition...
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