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Forms of Inorganic Phosphorus in the C Horizons of Some Iowa Soils
Author(s) -
Stelly M.,
Pierre W. H.
Publication year - 1943
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/sssaj1943.036159950007000c0021x
Subject(s) - citation , library science , new horizons , phosphorus , graduate students , computer science , sociology , chemistry , engineering , pedagogy , organic chemistry , spacecraft , aerospace engineering
M. STELLY AND W. H. PiERRE THE C horizons of many Iowa soils derived from loess contain several hundred parts per million of dilute acid-soluble phosphorus (i3). In spite of this high solubility, the phosphorus in some of these soils has a low availability to such plants as corn and sudan grass, although in general a fair availability to alfalfa. In the C horizon of other soils, however, the phosphorus has a high availability to all these crops even when the amount of dilute acid soluble phosphorus is, considerably less (16). In view of these results it seemed desirable to undertake a study of the forms of phosphorus present in the C horizon of these soils. This was done largely by comparing the phosphorus solubility of various naturally occurring phosphate minerals in solutions of different pH values with that of the soils under investigation.