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1. How Agronomic Management Affects Soil Nitrous Oxide EmissionsThe effects of crop and soil management practices on soil emissions of non-carbon dioxide (CO2) greenhouse gases (GHGs) such as nitrous oxide (N2O) are highly variable, and long-term field data are limited. Management strategies that impact nitrogen (N) mineralization are also likely to affect how N is lost to the atmosphere as N2O gas. This presentation covers the agroecosystem soil N cycling concepts leading to losses as N2O as well as... V.L. Jin, M.R. Schmer, B.J. Wienhold |
2. Sidedressed swine manure slurry via dragline hose produces comparable corn grain yields as commercial fertilizersSpring in the upper Midwest can be short and often wet, providing challenges for producers to apply manure and plant crops in a timely manner to maximize yield. As a result, producers apply a significant amount of their manure in the fall after the crop is harvested. Fall applied manure has adequate time to mineralize and leave the root zone before next season’s crop can utilize the nutrients the following summer. These nutrients can end up in rivers and other freshwater bodies, decreas... C. Pfarr, M. Wilson |
3. Four R Nitrogen management for cotton. MU-FDRC research update.Cotton is a much different crop than corn. In addition to the dicot vs. monocot difference, cotton is a perennial plant cultivated as an annual crop. A cotton crop must be “encouraged” to produce fruit and hence lint in this production system. Input management, including nitrogen fertilizers, are central to modern cotton production. Adequate nitrogen must be available to a cotton crop during the critical flowering period. In Missouri this is from mid-May to... D. Dunn |