Submitted to: American Society of Agronomy Meetings
Publication Type: Abstract Only
Publication Acceptance Date: 11/5/2000
Publication Date: N/A
Citation: N/A Interpretive Summary:
Technical Abstract: The Conservation Reserve Program (CRP) was established by the Food Security Act of 1985 to assist producers with highly erodible land (HEL). After ten years in permanent vegetation, HEL could be put into crop production. The concern was whether CRP land could be managed to sustain crop production while protecting the environment. Objectives of our research were to determine the influences of grass management, residue management, and N fertilization on wind erosion potential and potential loss of inorganic N and P. Hayed and no-hayed treatments were whole plots and N fertilizer (0 and 67 kg/ha) and residue management (conventional-, minimum-, and no-till) were strip-plots in a randomized complete block design with four replicates. After one complete cycle of a spring wheat-winter wheat-dry pea rotation, soil samples were collected for dry aggregate analysis. No-till (NT) and permanent perennial vegetation (PV) treatments had greater rthan 64% of the dry aggregates greater than 0.84 mm (nonerodible aggregates) compared to minimum- and conventional-till that had less than 57% nonerodible aggregates. The erodible fraction (less than 0.84 mm) for NT, MT, and CT treatments had significantly greater N and P concentrations and contents than the PV treatment.