Abstract:
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DPTA extractable zinc (ZnD) was found to be a reliable predictor of the response of subclover to zinc added to the soils. The critical levels of ZnD, determined for the maximum growth of subterranean clover were found to vary markedly among the soil types. No simple linear relationship between the critical ZnD levels and any one soil property were found. The ZnD critical levels were found to be related to the clay content (%) and pH (1:5 water)
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