Journal
SOIL & TILLAGE RESEARCH
Volume 74, Issue 1, Pages 81-90Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/S0167-1987(03)00121-1
Keywords
C sequestration; tillage; crop rotation; soil texture
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Carbon sequestration was determined for different tillage systems in semiarid to sub-humid climates and coarse to fine-soil texture in Saskatchewan, Canada. Annually cropped rotations sequestered 27-430 kg C ha(-1) per year more than crop rotations containing bare fallow. The potential for sequestering soil organic C (SOC) with crop rotations without bare fallow was greater in the sub-humid than in the drier climates. No-tillage (NT) sequestered 67-512 kg C ha(-1) per year more than tilled systems. With elimination of both tillage and bare fallow, the SOC increase was approximately 300 kg C ha(-1) per year in the semiarid climate regardless of soil texture, and approximately 800 kg C ha(-1) per year in the sub-humid climate. Relative annual increase in SOC under no-till was approximately a linear function of clay content across locations. Fine-textured soils have a greater potential for gains in SOC under no-till in Canadian prairie region. Crown Copyright (C) 2003 Published by Elsevier B.V. All rights reserved.
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