Adjusting Tillage Practices in a Corn/Soybean Rotation
2007
- UW-Madison Dept. of Soil Science
Project Media
Grain crop producers often rotate tillage management to meet soil conservation goals or disrupt yield-limiting soil conditions. A long-term tillage study containing plowed and no-till treatments was modified in 2005 to evaluate the effect of tillage change on soil properties and crop yield on a Plano silt loam soil at the Arlington Agricultural Research Station. Tillage treatments included continuous chisel tillage, the same chisel tillage converted to no-till, continuous no-till, chisel tillage of the same no-till, and strip-tillage. Tillage of the no-till resulted in soil test, penetrometer resistance, and bulk density levels similar to that of continuous chisel and improved early season K uptake by corn. Converting the chisel plowed treatment to no-till increased penetration resistance, bulk density, and decreased K uptake. Yield tended to be highest where the no-till treatment was tilled and lowest where the chiseled treatment was rotated to notill. These preliminary results showed that tilling continuous no-till may improve soil quality parameters as evidenced by the lower bulk density and penetration resistance, which enhanced nutrient utilization and crop growth and yield. Conversion of plowed ground to no-till reduced these soil quality factors, as well as crop yield and growth possibly due to changes in soil consolidation.