References
- Aldrich , S. 1980 . Nitrogen in relation to food, environment and energy , Univ. of Ill‐Urbana‐Champaign . Illinois Agric. Expt. Sta. Spec. Publ. 61.
- Allison , F. E. 1965 . “ Evaluation of incoming and outgoing processes that affect soil nitrogen ” . In Soil Nitrogen , Edited by: Bartholomew , M. W. and Clark , F. E. Madison , WI : Amer. Soc. Agron. . Monograph 10.
- Carson , P. L. 1980 . “ Recommedned nitrate‐nitrogen soil tests ” . In Recommended Chemical Soil Test Procedures for the North Central Region , Edited by: Dahnke , W. C. North Central Regional Publication 221 . (Revised) (North Dakota Agric. Expt. Sta. Bull. 499 (Revised))
- Smith , C. M. 1977 . “ Interpreting inorganic nitrogen soil tests: Sample depth, soil water, climate and crops ” . In Soil Testing: Correlating and Interpreting the Analytical Results , Edited by: Stelly , M. 85 – 98 . Madison , WI : Amer. Soc. Agron., Inc. . ASA Special Publication 29
- A contribution of the Missouri Agricultural Experiment Station. Journal Series No. 9497.
- Professor of Agronomy, former research specialist and former graduate assistant, Department of Agronomy, University of Missouri, Columbia, MO 65211. WCR is now crop breeder, Weaver Popcorn Co., New Richmond, IN 47967. GDH is Extension Area Agronomist, Montgomery City, MO 63361.