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Genotypic Response to Potassium in Soybeans 1
Author(s) -
Walker A. K.,
Schillinger J. A.
Publication year - 1975
Publication title -
crop science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.76
H-Index - 147
eISSN - 1435-0653
pISSN - 0011-183X
DOI - 10.2135/cropsci1975.0011183x001500040038x
Subject(s) - loam , biology , fertility , soil fertility , yield (engineering) , cultivar , agronomy , growing season , soil water , population , ecology , demography , materials science , sociology , metallurgy
Soybean [ Glycine max (L.) Merr.] genotypes usually yield about the same under high K fertility as under moderate K fertility. The objective of this study was to verify the results of a preliminary screening test, which revealed that the FC31702 and ‘Lincoln’ genotypes were responsive and nonresponsive, respectively, to high K fertility. FC31702 and Lincoln soybeans were grown under moderate (approximately 130 kg K/ha) and high (approximately 193 kg K/ha) K fertility on a Beltsville silt loam soil for 3 years. ‘Cutler,’ a recommended cultivar for Maryland, also was included the last 2 test years. Seed yield and percent K in the leaves during the growing season were determined. FC31702 had a significant increase in seed yield when grown under high K fertility as compared to moderate K fertility. Lincoln and Cutler had no yield increase. The response in yield of FC31702 to high K fertility was associated with higher K percentages in the leaves during the growing season.