1. Bias;Allmaras,1965
2. Comparison of models for describing corn yield response to nitrogen fertilizer;Cerrato;Agron. J.,1990
3. Effect of soil tillage on residual nitrogen contribution by a red clover green manure crop to subsequent corn crops. M. S. Thesis;Craig,1987
4. Nitrogen dynamics in conventional and no-tillage corn production following legume cover crops. Ph. D. Thesis;Dou,1993
5. Nitrogen utilization with no-tillage;Fox,1986