Abstract
Changes in the mineral composition of alfalfa which resulted from the application of 4 lime treatments to 7 acid soils in a growth chamber experiment were studied. Manganese and aluminum concentrations in tops and roots decreased. The relationships between plant content of these elements and various measures of soil aluminum and manganese were investigated. Levels in both tops and roots were best correlated with amounts of the corresponding elements extracted from the soils byN KCl. Zinc levels in tops and roots and magnesium content of tops declined due to liming whereas calcium and molybdenum levels in both plant parts increased. The changes in plant mineral composition helped to elucidate the factors responsible for the increased alfalfa yields obtained when acid soils are limed.
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