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Preliminary Report on Availability of Different Forms of Phosphate Fertilizers on Two “Red Hill” Soils and the Relation of Phosphate Response to Nitrogen Deficiency 1
Author(s) -
Bhaskar T. D.,
Stephenson R. E.,
Ruzek C. V.
Publication year - 1951
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/agronj1951.00021962004300030007x
Subject(s) - citation , phosphate , library science , relation (database) , nitrogen , soil water , mathematics , operations research , computer science , environmental science , chemistry , soil science , database , organic chemistry
THE residual soils of Western Oregon known locally as "red hill" soils comprise two major groups, those derived from basic igneous rocks, principally basalt and diabase, and those derived from sedimentary rocks consisting of sandstone and shale. The Olympic soil of this study represents the igneous group, while the Melbourne represents the sedimentary formations. The "red hill" soils as a group are acid and characteristically low in available phosphorus by chemical methods. Superphosphate used on some crops as indicated by field trials gives a good response and on others little or none. This study was planned to use several sources of phosphate fertilizer to determine which was more effective in supplying available phosphorus for plant .growth, both when used alone and when used with a nitrogen fertilizer to correct the known nitrogen deficiency in the soils.