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Soybeans for green manure in the wet tropics

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As a green manure crop, soybeans provide good quantities of dry matter and large amounts of nitrogen... Better efficacy could be obtained by using smaller nozzles and lower water rates on small weeds... The problem with the system in the wet tropics is that decomposition is rapid and much of the available nitrogen will be lost through leaching or denitrification under waterlogged conditions...
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