Research continued at a long-term crop rotation testing site near Boone, Iowa. In this stage of the trial, attention was directed to estimating soil erosion with the RUSLE2 model, measuring soil nitrogen transformations and nitrogen uptake by corn, and assessing the farm economics of these more varied crop production scenarios using enterprise budgeting techniques.
Could diversifying corn- and soybean-based cropping systems with oat, red clover, and alfalfa improve environmental performance characteristics while maintaining or improving profitability?
Results of this project contribute to a growing understanding of the performance characteristics of diversified cropping systems, including economic costs and returns, and basic biophysical processes like soil erosion and nutrient cycling.
Year of Grant Completion
Liebman, Matthew Z.; Castellano, Michael J.; and Johanns, Ann M., "Impacts of conventional and diversified rotation systems on crop yields, soil functions and environmental quality: Stage II/Year 2" (2015). Leopold Center Completed Grant Reports. 488.