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Subjects United States Remove constraint United States: United States Subjects tillage Remove constraint tillage: tillage Subjects nitrogen Remove constraint nitrogen: nitrogen

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1. Alfalfa Nitrogen Credit to First-Year Corn: Potassium, Regrowth, and Tillage Timing Effects

Description:: Includes references
Author:: Yost, Matt A. , Coulter, Jeffrey A. , Russelle, Michael P. , Sheaffer, Craig C. , Kaiser, Daniel E.
Subject:: Medicago sativa , Zea mays , alfalfa , corn , fertilizer rates , fertilizer use reduction , fine-textured soils , grain yield , nitrogen , nitrogen fertilizers , plants , potassium , prices , regrowth , silage , tillage , United States
Collection:: Journal Articles, USDA Authors, Peer-Reviewed
Year:: 2012

2. Nitrogen management strategies to reduce nitrate leaching in tile-drained midwestern soils

Description:: Includes references
Author:: Dinnes, D.L. , Karlen, D.L. , Jaynes, D.B. , Kaspar, T.C. , Hatfield, J.L. , Colvin, T.S. , Cambardella, C.A.
Subject:: soil fertility , nitrogen , soil management , leaching , tile drainage , groundwater , groundwater contamination , water pollution , surface water , water quality , tillage , crops , soil organic matter , hydrology , air temperature , precipitation , monitoring , crop rotation , cover crops , conservation tillage , nitrification inhibitors , wetlands , biofiltration , application rate , literature reviews , United States
Collection:: Journal Articles, USDA Authors, Peer-Reviewed
Year:: 2002

3. Sampling error in U.S. field crop unit process data for life cycle assessment

Author:: Joyce Smith Cooper , Ezra Khan , Robert Ebel
Subject:: Agricultural Resource Management Survey , USDA , confidence interval , corn , crop production , data analysis , durum wheat , fertilizer application , field crops , foods , inventories , irrigation , life cycle assessment , nitrogen , oats , organic fertilizers , peanuts , pesticide application , pesticides , rice , sampling , seeds , soybeans , tillage , uncertainty , United States
Collection:: Journal Articles, USDA Authors, Peer-Reviewed
Year:: 2013