Abstract
Abstract Soil tests are used to predict fertilizer and liming needs of legumes being introduced into permanent pastures. However, the routine drying of soil samples may change the soil characteristics so much that recommendations based on test results may be poorly related to actual plant needs in the field. Test results from four soils, based on dried and moist samples, were related through stepwise multiple regression to percent nodulation and dry weight of white clover (Trifolium repens L. ) seedlings grown on soil cores in the greenhouse. Highly variable test results were obtained for Al, Mn, and P, depending on if a sample was dried or maintained moist. These discrepancies have implications for making P fertilizer and liming recommendations. Test results for other elements also varied widely. Extractable Mn and P accounted for most of the variation observed in percent nodulation, whether soil samples were dried or not. There was a significant interaction of P, Al, and Mn extracted from dried soils wi...
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