Research has shown that significant levels of crop residues can accumulate in fields where wheat or corn are frequent component crops. Laboratory research shows that after harvest, most crop residues have wide C:N ratios, which encourages N immobilization. Adding a high N-mineralizing cover crop may negate the immobilization through supplementing microbial N needs during crop development. Since previous work was done in the laboratory, researchers look to validate findings under field conditions. Knowledge of N cycling mechanisms from post-harvest crop residues in combination with cover crops in long-term no-till will inform growers about the most efficient use of their nitrogen fertilizer applications.

Key Benefactors:
farmers, agronomists, extension specialists