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Soil Organic Matter and Nitrogen Changes During 24 Years of Dryland Wheat Tillage and Cropping Practices
Author(s) -
Unger Paul W.
Publication year - 1968
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/sssaj1968.03615995003200030043x
Subject(s) - tillage , agronomy , organic matter , environmental science , soil organic matter , mulch , conventional tillage , cropping , cropping system , no till farming , soil water , soil fertility , biology , agriculture , soil science , crop , ecology
Soil organic matter and total nitrogen were determined after 24 years 3 of growing dryland wheat ( Triticum aestivum L.) under various tillage and cropping practices in the Southwestern Great Plains. The various tillage practices resulted in significant differences in soil organic matter content when a wheat‐fallow cropping system was used. Values were highest for delayed stubble‐mulch tillage. Differences in soil organic matter content due to tillage practices used were not significant where wheat was grown continuously, but values for continuous wheat were higher than those for wheat‐fallow for comparable tillage practices. Soil total N content was significantly affected by the tillage practice used for the wheat‐fallow, but not the continuous wheat cropping system. Values for continuous wheat were higher than those for wheat‐fallow for comparable tillage treatments. Soil organic matter was closely related to soil total N.