Premium
The Effects of 12‐year Residues of Lime and Magnesia upon the Outgo of Subsequent Additions of Potash 1
Author(s) -
MacIntire W. H.,
Shaw W. M.,
Young J. B.,
Robinson B.
Publication year - 1936
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/agronj1936.00021962002800030004x
Subject(s) - citation , potash , lime , library science , chemistry , mathematics , computer science , potassium , materials science , metallurgy , organic chemistry
T HE literature relating to calcium-potassium relationships in soil systems is extensive. The subject has been attacked from several angles. When unlimed soil is agitated in water and in a neutral solution of a calcium salt, the filtrate from the latter generally shows the higher content of potassium. From this it has been deduced that incorporations of liming materials will result in a liberation of soil potassium. On the other hand, the potassium content of the rainwater Ieachings from an acid soil will be greater than the potassium content of the leachings from the same soil limed. As a corollary, the potassium content of the ash of a plant grown on an acid soil will exceed the potassium content of the ash of the same plant grown on that soil after full-depth liming. The two latter methods of attack furnished data that warrant the conclusion that lime does not effect a liberation of soil potash. The literature on the subject has been presented in several previous publications from the Tennessee Experiment Station, all of which were cited in the last contribution on the subject in 193o (4)2 Since that time additional contributions have been made by Jenny and Shade (i), Lamb (2), Peech and Bradfield (7), Sewell and Latshaw (8), and Snyder (io), and in a joint study from the Virginia Tennessee Experiment Stations (6). In the several contributions from the Tenessee Station the influence of calcic and magnesic additions upon the solubility of soil potash has been measured by the outgo of potassium from native supplies and from simultaneous incorporations of potash and liming materials. The present contribution deals with the effects induced by i2-year residues of calcic and magnesic materials upon the fate of the potassium supplied by six subsequent annual additions of potassium sulfate, as measured by the content of rainwater leachings from outdoor lysimeters.