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Final Report: CSO232 - Managing the fallow period for optimum water use and nitrogen availability

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The project has demonstrated that summer fallow management can play an important role in regulating soil moisture storage, either to reduce the risk of deep drainage, or to benefit the crop... The lysimeter experiments showed that a 4 t/ha residue cover past sowing (early and mid June) could reduce evaporation losses by approximately 10 mm in 2005 (see Fig. A2) and 15 mm in 2006... To minimise the risk of deep drainage, residue retention should be avoided as much as possible and residue loads reduced to 1 t/ha or less, unless required for other purposes (e.g. erosion control)...
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