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Subjects United States Remove constraint United States: United States Subjects cropping systems Remove constraint cropping systems: cropping systems Subjects field crops Remove constraint field crops: field crops

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1. Evaluation of dairy manure nitrogen-15 enrichment methods on short-term crop and soil nitrogen budgets

Description:: Includes references
Author:: Powell, J.M. , Kelling, K.A. , Munoz, G.R. , Cusick, P.R.
Subject:: cover crops , crop production , crop management , cropping systems , field crops , grasses , costs and returns , crop yield , legumes , literature reviews , cattle manure , nitrogen , stable isotopes , isotope labeling , nitrogen content , soil amendments , soil nutrient balance , soil fertility , soil nutrients , agricultural soils , silt loam soils , nutrient uptake , Zea mays , corn , United States , Michigan
Collection:: Journal Articles, USDA Authors, Peer-Reviewed
Year:: 2005

2. Grass-based farming systems: soil conservation and environmental quality

Description:: Includes references
Author:: Singer, Jeremy W. , Franzluebbers, Alan J. , Karlen, Douglas L.
Subject:: field crops , crop production , land use change , grasses , forage grasses , crop yield , farming systems , cropping systems , crop rotation , sustainable agriculture , Conservation Reserve Program , forage legumes , United States
Collection:: Journal Articles, USDA Authors, Peer-Reviewed
Year:: 2009