HR: 1330h
AN: B42A-0935    [PDF]
TI: Biomass Production and Soil Carbon Level Changes in Various Tillage, Residue Management, and Cropping Systems in Moderately High Organic Matter Soils in Eastern South Dakota, U.S.A.
AU: Woodard, H J
EM: Howard_Woodard@sdstate.edu
AF: South Dakota State University, Plant Science Department Agricultural Hall 004 Box 2207-A, Brookings, SD 57007 United States
AU: * Bly, A
EM: Anthony_Bly@sdstate.edu
AF: South Dakota State University, Plant Science Department Agricultural Hall 004 Box 2207-A, Brookings, SD 57007 United States
AB: A four-year replicated field study was conducted in eastern South Dakota to assess the impact of maize (Zea mays L.), soybean (Glycine max L.), and spring wheat (Triticum aestivum L.) on crop residue accumulation and soil carbon when various tillage, crop residue management, and crop rotation scenarios were applied. Before planting, half the plots were chisel plowed and harrowed (tilled vs. no-till treatments). Corn-soybean, soybean-wheat, or corn-wheat-soybean rotations were established (rotation treatments). After grain harvest, crop residues were removed on half of the plots (residue-removed vs. residue-retained treatments). The range of initial soil carbon levels (loss by ignition method) for the 0-15cm depth was 1.7-3.0%. Post-harvest crop residue accumulation was greatest for the residue-retained treatment compared to the residue-removed treatment and for the no-till treatment compared to the tilled treatment. In addition, surface biomass accumulation was greatest when maize was part of a crop rotation. Maize can produce greater levels of biomass compared to either spring wheat or soybean. The least surface biomass accumulation was measured in the soybean-wheat rotation.
DE: 0400 Biogeosciences
SC: Biogeosciences [B]
MN: 2003 Fall Meeting