Abstract
Abstract. Correlation analysis was used to determine the main factors related to soil pH and to yield of white clover in a range of hill soils. Results for 109 Northern Ireland pasture soils showed that pH (H2O) was significantly correlated with exchangeable Ca, total exchangeable bases, base saturation, P, exchangeable Al and Al saturation, but not with exchangeable Mn. Clover yield (dry weight of shoots) in 12 acid soils from Northern Ireland, Scotland and the Falkland Islands was significantly correlated with exchangeable Ca, total exchangeable bases and Al saturation. The results support the use of Al saturation rather than exchangeable Al, soil solution Al or pH when calculating lime requirements to overcome these limiting factors in hill soils.
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