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Phosphorus Changes in Great Plains Soils as Influenced by Cropping and Manure Applications
Author(s) -
Haas H. J.,
Grunes D. L.,
Reichman G. A.
Publication year - 1961
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/sssaj1961.03615995002500030022x
Subject(s) - manure , soil water , cropping , agronomy , phosphorus , environmental science , green manure , chemistry , zoology , agriculture , soil science , biology , ecology , organic chemistry
Soil samples from 15 dryland experiment stations in the U. S. Great Plains and 21 farms in North Dakota were analyzed to determine the effect of cropping and manure on total, inorganic, organic, and NaHCO 3 ‐soluble P content. In general, total P in the surface 6 inches of soil increased from south to north. Total P in soils from the experiment stations was reduced an average of 8% by cropping without manure, but was increased an average of 14% above virgin sod where manure had been applied. Inorganic P was not influenced by cropping to a rotation without manure, but organic P was reduced an average of 35% as compared to virgin sod. Manure applied in the rotation increased inorganic P considerably, but had no effect on reducing the loss of organic P. Cropping without manure increased NaHCO 3 ‐soluble P in the soil at the majority of the stations, with the greatest increase occurring in the south. When manure was applied in the rotation, NaHCO 3 ‐soluble P averaged nearly five times that of virgin sod. A highly significant positive correlation existed between NaHCO 3 ‐soluble P and total P of virgin soils from the southern stations, but a significant correlation did not exist for the northern stations.