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Crop Response to Potash on Oregon Soils
Author(s) -
Powers W. L.,
Alban L. A.
Publication year - 1949
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/sssaj1949.036159950013000c0061x
Subject(s) - potash , citation , soil water , library science , archaeology , environmental science , geography , computer science , soil science , ecology , fertilizer , biology
POTASH fertilizer investigations during the past four decades have included many Oregon soil types in laboratory and greenhouse studies. Positive response to potash has been followed by field trials, checked by tests of leaf composition, available soil potash, and recuperative characteristics of native soils. During the past decade a grant-in-aid has helped secure an inventory of soil potash supplies in major soil series and its relation to yield, quality, and composition of indicator crops. This has led to preparation of a preliminary soil potash availability map of the State and tentative standards of adequacy for several indicator crops. The information accumulated is summarized to present the present status of our knowledge of potash needs of Oregon soils.