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HRZ trials investigate new yield-lift tactics

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Deep placement of manure into sodic clay subsoils is showing yield benefits six years after treatment.. "We've learnt a lot by digging holes to look at the subsoil and in large parts of the HRZ we've found dense sodic clay subsoils packed so tightly there is little space for air or water movement," Ms Paridaen says... In 2009, with GRDC support, the trials were extended to other locations in Victoria and the best responses were measured after incorporation of 20t/ha of poultry manure...
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