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Soil Phosphorus in South Dakota: III. Phosphorus Fractions of Some Borolls and Ustolls
Author(s) -
Westin F. C.,
Buntley G. J.
Publication year - 1967
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/sssaj1967.03615995003100040028x
Subject(s) - transect , phosphorus , soil water , mineralization (soil science) , environmental chemistry , nitrogen , organic matter , chemistry , total organic carbon , carbon fibers , environmental science , soil science , geology , mathematics , organic chemistry , oceanography , algorithm , composite number
The data for the phosphorus fractions and carbon and nitrogen for 8 soils classified as Borolls and 8 as Ustolls along a 260‐km transect are compared. The Ustolls generally have, in their upper horizons, appreciably more Fe‐P, and reductant‐P, less Ca‐P, and slightly less Al‐P than the Borolls. Organic P values are a little higher and carbon and nitrogen percentages are slightly lower among the Ustolls. In general, the ratio of carbon to phosphorus in the organic matter is lower among the Ustolls indicating that there probably is a higher rate of mineralization of organic P taking place in the Ustolls than in the Borolls. The proportions of the phosphorus fractions in the various horizons of the soils appear to reflect the climatic change occurring along the transect.