RELATION OF SOIL AND FERTILIZER POTASSIUM TO DRY MATTER CONTENT AND YIELD OF POTATOES

Publisher Website
Google Scholar
Abstract
The specific gravity of Irish potato tubers grown under various levels of exchangeable soil K and various amts. and kinds of potash fertilizer was determined. Chemical analyses of tubers, tops, and rachises were made on samples taken from plants so treated. Results showed an inverse relationship between K and dry matter content of tubers. Heavy applications of KC1 in fertilizer resulted in marked increases in Cl content of rachises and decreases in dry matter content. The latter was increased with K2SO4 used as potash source over that with KC1. Opt. exchangeable soil K level for highest dry matter content was 200-350 lbs. per acre. Dry matter content of tubers grown with 180 lbs. K2O as muriate of potash in the fertilizer decreased with increase in exchangeable soil K up to 500-700 lbs. per acre. Acre yields of dry matter in tubers grown with K fertilization increased only slightly above 200-400 lbs. exchangeable K in the soil.
Keywords

This publication has 0 references indexed in Scilit: