THE EFFECT OF POTASSIUM, NITROGEN AND PHOSPHORUS FERTILIZING UPON THE CHLOROPLAST PIGMENTS, UPON THE MINERAL CONTENT OF THE LEAVES, AND UPON PRODUCTION IN CROP PLANTS

Open Access
Publisher Website
Google Scholar
Abstract
Usually N is correlated with increased chloroplast pigment development, while K evidently suppresses the development of these pigments. P seemed to be correlated with more chloroplast pigments than K and less than N. Cotton and potato plants fertilized with mixtures high in N or P are correlated with leaves high in these elements. Mixtures high in K produced cotton leaves high in K and potato leaves low in K. Attempts at a correlation in S also were made. Yields seemed to be correlated with types of soil and fertilizer used rather than with fertilizer alone, which would lead one to believe that fertilizers are not a direct factor in crop production.