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Subjects mathematical models Remove constraint mathematical models: mathematical models Subjects nitrogen Remove constraint nitrogen: nitrogen Year 2008 Remove constraint 2008: 2008

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1. A mechanistic treatment of the dominant soil nitrogen cycling processes: model development, testing, and application

Description:: Includes references
Author:: Maggi, F. , Gu, C. , Riley, W.J. , Hornberger, G.M. , Venterea, R.T. , Xu, T. , Spycher, N. , Steefel, C. , Miller, N.L. , Oldenburg, C.M.
Subject:: nitrogen , biogeochemical cycles , agricultural soils , gas emissions , losses from soil , leaching , nitrogen fertilizers , fertilizer application , anhydrous ammonia , nitrate nitrogen , nitrites , irrigation rates , nitrification , denitrification , soil bacteria , irrigation , simulation models , mathematical models , model validation , denitrifying bacteria , California
Collection:: Journal Articles, USDA Authors, Peer-Reviewed
Year:: 2008

2. Do Synergistic Relationships between Nitrogen and Water Influence the Ability of Corn to Use Nitrogen Derived from Fertilizer and Soil?

Description:: Includes references
Author:: Kim, K.I. , Clay, D.E. , Carlson, C.G. , Clay, S.A. , Trooien, T.
Subject:: Zea mays , corn , synergism , nitrogen , plant available water , nutrient use efficiency , nitrogen fertilizers , nutrient uptake , soil fertility , soil water content , fertilizer rates , urea , evapotranspiration , plant growth , mathematical models , South Dakota
Collection:: Journal Articles, USDA Authors, Peer-Reviewed
Year:: 2008

3. Evaluating Multiple Indices from a Canopy Reflectance Sensor to Estimate Corn N Requirements

Description:: Includes references
Author:: Sripada, Ravi P. , Schmidt, John P. , Dellinger, Adam E. , Beegle, Douglas B.
Subject:: Zea mays , corn , nitrogen , plant nutrition , nutrient requirements , canopy , reflectance , remote sensing , nitrogen fertilizers , economic analysis , fertilizer rates , field experimentation , application timing , color , grain yield , mathematical models , equations , Pennsylvania
Collection:: Journal Articles, USDA Authors, Peer-Reviewed
Year:: 2008

4. Nitrogen transactions along the gastrointestinal tract of cattle: A meta-analytical approach

Description:: Includes references
Author:: Marini, J.C. , Fox, D.G. , Murphy, M.R.
Subject:: cattle , digestive tract , nitrogen , nutrient balance , nutrient requirements , rumen microorganisms , duodenum , intestinal absorption , nutrient uptake , data analysis , ileum , feces , estimation , mathematical models , simulation models , small intestine , hindgut
Collection:: Journal Articles, USDA Authors, Peer-Reviewed
Year:: 2008

5. Simulating the Long-Term Performance of Drainage Water Management Across the Midwestern United States

Description:: Includes references
Author:: Thorp, K.R. , Jaynes, D.B. , Malone, R.W.
Subject:: drainage water , water management , water flow , subsurface drainage , simulation models , mathematical models , pollution control , nonpoint source pollution , nitrogen , nitrate nitrogen , Root Zone Water Quality Model , Midwestern United States
Collection:: Journal Articles, USDA Authors, Peer-Reviewed
Year:: 2008

6. Summer cover crop impacts on soil percolation and nitrogen leaching from a winter corn field

Description:: Includes references
Author:: Muñoz-Carpena, R. , Ritter, A. , Bosch, D.D. , Schaffer, B. , Potter, T.L.
Subject:: Crotalaria juncea , cover crops , nitrogen , leaching , infiltration (hydrology) , Zea mays , corn , vadose zone , soil water content , soil water balance , soil nutrient balance , nitrogen fertilizers , fertilizer application , groundwater contamination , drainage , prediction , mathematical models , Florida
Collection:: Journal Articles, USDA Authors, Peer-Reviewed
Year:: 2008