Physico- chemical properties of soil: Agricultural use of soil affected its chemical properties . The changes in these properties were associated with the organic and inorganic fertiliser management practices at each plot. Soil from the organic plot showed an increase in organic carbon content ( Table 1 ) compared to other plots, this might be due to the addition of organic amendments as they are the sources of nitrogen and carbon to soils. This agrees with finding from several other researchers, Kumar et al . (2000) found that the organic materials, applied alone or in combination with inorganic fertilizer gave greater residual soil fertility in terms of increase in organic carbon content from to as high as % and the available N, P and K in the 2-years cropping cycle.
This fact-sheet has been funded by the Healthy Soils for Sustainable Farms programme, an initiative of the Australian Government’s Natural Heritage Trust in partnership with the GRDC , and the WA NRM regions of Avon Catchment Council and South Coast NRM , through National Action Plan for Salinity and Water Quality and National Landcare Programme investments of the WA and Australian Governments.
The Chief Executive Officer of the Department of Agriculture and Food , The State of Western Australia and The University of Western Australia accept no liability whatsoever by reason of negligence or otherwise arising from the use or release of this information or any part of it.