Long-term N fertilization and conservation tillage practices conserve surface but not profile SOC stocks under semi-arid irrigated corn

• Published in: Soil & tillage research Vol. 171; pp. 9 - 18
• Main Authors: Stewart, Catherine E., Halvorson, Ardell D., Delgado, Jorge A.
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.08.2017
• Subjects: Colorado; conservation practices; corn; fertilizer rates; grain yield; irrigation; Nitrogen fertilization; nitrogen fertilizers; no-tillage; particulate organic matter; Soil carbon sequestration; soil organic carbon; soil profiles; stover; strip tillage; Tillage; Colorado; SOM; CT; ST; Nitrogen fertilization; RT; NT; SOC; Tillage; DOC; DN; Soil carbon sequestration

•SOC was lost over the study through the 0–120cm profile regardless of N fertilizer or tillage treatments.•Fertilization increased surface SOC stocks and reduced SOC loss in the 7.5–15 and 15–30cm depths.•Strip till completely reversed no-till surface SOC gain after the initial 5 years of NT. No til...