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organic soil amendment

Catalogue: GRDC Final Reports
The aim of the project was to investigate the use of compost as a partial substitute for synthetic phosphorus (P) fertilisers in Vietnam... Results of the project indicated that the use of compost as a substitute for synthetic P fertiliser is a viable solution to the predicted increases in demand and cost of mined P fertiliser... While glasshouse results showed that synthetic fertilisers are able to be substituted with compost, a nutritionally balanced field trial which uses more appropriate sampling times, as well as a collection of plant tissue samples, is proposed as an area for further research...
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Catalogue: GRDC Publications
Soil organic carbon makes up about 58 per cent of the mass of organic matter and is usually reported in a soil analysis report as the concentration (i.e. per cent) of organic carbon in soil (see Chapter 1 for more detail)... If a soil has a significant amount of gravel or stone material, this fraction is removed before analysis with the final soil carbon or nutrient assessment being only representative of the mineral component of the remaining soil... Understanding how organic matter cycles through the soil and what drives its accumulation and loss is critical to maintaining it at optimal levels within agricultural systems...
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