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The Effect of Nitrogen upon the Response of Cotton and Oats to Phosphorus 1
Author(s) -
Coleman Russell
Publication year - 1944
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/agronj1944.00021962003600120002x
Subject(s) - citation , agricultural experiment station , nitrogen , soil water , phosphorus , library science , mathematics , agronomy , horticulture , agriculture , history , computer science , environmental science , chemistry , archaeology , biology , soil science , organic chemistry
M UCH of the large amount of phosphate fertilizer used in Mississippi fails to give increased crop yields. Numerous attempts have been made to explain why the soils low in phosphate dq not respond to applied phosphorus. The most widely accepted explanation is that these soils fix the phosphate applied as fertilizer in an unavailable form. This may be true in some cases, but there is evidence which indicates that this is not always the controlling factor. Since a low nitrogen content of Mississippi soils is often the limiting factor in crop production, and since there appears to be a relationship between the utilization of nitrogen and phosphorus by the plant, it seems possible that the nitrogen content of the soil is often too low to permit the proper utilization of applied phosphorus. The purpose of the present investigation was to study the effect of the nitrogen level of the soil upon the response.of cotton and oats to phosphorus.