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Effects of Long‐Time Cropping on Hydrolyzable Organic Nitrogen Fractions in Some Great Plains Soils
Author(s) -
Porter L. K.,
Stewart B. A.,
Haas H. J.
Publication year - 1964
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/sssaj1964.03615995002800030020x
Subject(s) - soil water , fraction (chemistry) , cropping , nitrogen , chemistry , agronomy , hydrolysis , environmental science , environmental chemistry , soil science , biology , geography , agriculture , organic chemistry , archaeology
Virgin soils and their long‐time cropped counterparts were hydrolyzed with HCl. The N separated into three fractions. The proportion of N that each N fraction contributed to the total N was altered when comparisons were made between virgin soils and their cropped counterparts. Cultivation and cropping caused losses in all three N fractions, however, the nondistillable acid‐soluble N fraction lost a greater proportion of its N than did the other two fractions.