NUTRIENT DEFICIENCIES IN THE STRAWBERRY LEAF AND FRUIT

Abstract

1. Foliar symptoms of potassium, calcium, magnesium, phosphate, and nitrogen deficiencies are described for both Blakemore and Klondike straw- berry varieties during the fruiting stage of growth. 2. Marked varietal differences in potassium and calcium deficiency symp- toms are noted and illustrated. 3. Soluble minerals were determined in the foliage and fruit of plants receiving the various nutrient treatments, and the results obtained are illustrated. 4. In the complete nutrient treatment of each variety the potassium concentration in relation to other soluble minerals in the fruit was high as compared with the same relationship in the leaves. 5. There were only traces of soluble phosphate in the foliage and fruit at the time phosphate deficiency symptoms were evident. DIVISION