STUDIES ON MINERAL DEFICIENCY IN PINE

Abstract
Seedlings of Pinus strobus, P. echinata, P. rigida, and P. resinosa were grown in sand culture under starvation conditions of N, P, K, and Mg. Detailed descriptions of the symptoms of mineral deficiencies resulting are given. The plants were harvested after growing 26 weeks in the greenhouse. Individual plant measurements were made on height of top, diam. of stem, dry wt. of top, and dry wt. of root.