RELATION OF COMPOSITION TO GROWTH AND FRUITFULNESS OF YOUNG APPLE TREES AS AFFECTED BY GIRDLING, SHADING, AND PHOTOPERIOD

Abstract

The growth of young apple trees was not correlated with the external environment, but with their internal composition. The relative amounts of such materials as carbohydrates and N compounds rather than the total amounts appear to determine the growth type and fruitfulness of the trees. Practically, the character of the growth should be used as a basis for determining cultural needs.