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Effect of Lime and Potassium Additions on Soil Potassium Reactions and Plant Response
Author(s) -
Powell A. J.,
Hutcheson T. B.
Publication year - 1965
Publication title -
soil science society of america journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.836
H-Index - 168
eISSN - 1435-0661
pISSN - 0361-5995
DOI - 10.2136/sssaj1965.03615995002900010023x
Subject(s) - lime , potassium , chemistry , soil water , wetting , mineralogy , soil science , geology , materials science , metallurgy , organic chemistry , composite material
Lime and/or wetting‐drying cycles following its application to soils of micaceous mineralogy resulted in lower exchangeable K levels, as measured by N NH 4 OAc extraction, which were closely correlated with K levels before liming. K level changes were not related to initial pH levels over a range from pH 4.7 to 6.2. Liming effects on exchangeable K levels were not reflected by crop response or uptake of K. Release of nonexchangeable K was enhanced and fixation of applied K was prevented by lime applications. It is suggested Ca 2+ ions may prop open edges of clay mineral packets, thus preventing entrapment of K + ions and releasing previously “trapped” or lattice K.