3. Results
On Grantsburg soil with 5 - 7 percent slopes, the estimated annual soil loss (Table 1), measured with USLE and
RUSLE2, were 8.1, 22.4, and 30.1 Mg∙ha−1 with the NT, CP and MP systems without cover crops and 6.2, 18.6,
and 24.3 Mg∙ha−1 with cover crops respectively. The higher the percentage of crop residue (Table 1) on the soil
surface with the NT system protected the soil from erosion keeping it below the tolerance level of 8.4
Mg∙ha−1∙yr−1. Rill erosion was observed with the MP and CP systems with and without cover crops due in part to
lower residue on soil surface compared with the NT system with or without cover crop. The amount of SOC
transported per year from the plots by soil erosion is provided by tillage treatment with and without cover crops.
3. ResultsOn Grantsburg soil with 5 - 7 percent slopes, the estimated annual soil loss (Table 1), measured with USLE andRUSLE2, were 8.1, 22.4, and 30.1 Mg∙ha−1 with the NT, CP and MP systems without cover crops and 6.2, 18.6,and 24.3 Mg∙ha−1 with cover crops respectively. The higher the percentage of crop residue (Table 1) on the soilsurface with the NT system protected the soil from erosion keeping it below the tolerance level of 8.4Mg∙ha−1∙yr−1. Rill erosion was observed with the MP and CP systems with and without cover crops due in part tolower residue on soil surface compared with the NT system with or without cover crop. The amount of SOCtransported per year from the plots by soil erosion is provided by tillage treatment with and without cover crops.
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