Premium
Method for Predicting Potassium Uptake by Grain Sorghum 1
Author(s) -
Hipp Billy W.,
Thomas Grant W.
Publication year - 1968
Publication title -
agronomy journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.752
H-Index - 131
eISSN - 1435-0645
pISSN - 0002-1962
DOI - 10.2134/agronj1968.00021962006000050007x
Subject(s) - sorghum , agronomy , greenhouse , potassium , sorghum bicolor , nutrient , bloom , poaceae , soil water , sweet sorghum , chemistry , correlation coefficient , mathematics , environmental science , soil science , biology , ecology , statistics , organic chemistry
A greenhouse experiment using nutrient solution culture with graded levels of K was used to determine the concentration of K required in grain sorghum leaves for optimum growth. It was determined that growth of grain sorghum is reduced if the leaf K concentration is much below 1.5% at the full bloom stage. A field study was made to relate soil K parameters from eight different soils to concentration of K in grain sorghum leaves at the full bloom stage of growth. The best method of predicting K uptake by plants included both solution K and exchangeable K. A correlation coefficient of 0.890 was obtained between percent K in leaves and solution K + log (1 + exchangeable K).