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soil moisture content

Catalogue: GRDC Media
Trials of mouldboard ploughing to alleviate non-wetting soils near Corrigin have produced impressive initial results including high crop yields and low weed numbers in what was a poor performing paddock... The CFIG research is also investigating other options for non-wetting soils including wetting agents, winged points and in-row seeding (as opposed to inter-row seeding) and is one of five RCS non-wetting soils projects in the western part of the Kwinana port zone... Mr Wallwork said the trial results reflected findings from the northern grainbelt which showed that mouldboard ploughing effectively changed the soil type by bringing subsoil to the surface...
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Catalogue: GRDC Media
Trials of mouldboard ploughing to alleviate non-wetting soils near Corrigin have produced impressive initial results including high crop yields and low weed numbers in what was a poor performing paddock... The CFIG research is also investigating other options for non-wetting soils including wetting agents, winged points and in-row seeding (as opposed to inter-row seeding) and is one of five RCS non-wetting soils projects in the western part of the Kwinana port zone... Mr Wallwork said the trial results reflected findings from the northern grainbelt which showed that mouldboard ploughing effectively changed the soil type by bringing subsoil to the surface...
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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 Updates
Surface application of ammonium sulphate fertiliser on alkaline cropping soils of northwest NSW poses a high risk of volatilisation loss, particularly if there is calcium carbonate (lime) at the surface... We are currently testing a range of surface soil samples from across northwest NSW and will present some results of these in the talk... Following this we will assess volatilisation loss potential at a selection of these soils to gauge the potential for losses in typical cropping situations...
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Catalogue: GRDC Updates
Previous studies have shown that values of EC t obtained in this way correlate closely with soil water accumulated to depths of 90cm or deeper... Figure 3 shows data for a field near Warra, Qld where EC t was used to estimate soil water to a depth of 90cm... Side-by-side comparison (Huth et al, 2012) of EM38 with neutron probes have shown that the EM38 is able to explain well over 90% of the variation in soil water measured with probes, but without the need for access tubes or radioactive sources, and with a much smaller time requirement...
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