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Abstract
A total of 539 leaf and soil samples collected from commercial blueberry (Vaccinium corymbosum L.) plantings throughout Michigan between 1975 and 1985 were analyzed for P, K, Ca and Mg. Significant but weak correlations were found between soil and leaf nutrient levels for P (r=0.084), K (0.239), Ca (0.088) and Mg (0.132). Soil levels of K, Ca and Mg were more closely correlated with leaf nutrient levels in young plants (< 7 years old) than in older plants, suggesting that soil tests may be most useful in monitoring the nutrient status of young plants.
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