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Subjects corn Remove constraint corn: corn Subjects Medicago sativa Remove constraint Medicago sativa: Medicago sativa Year 2004 Remove constraint 2004: 2004

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1. Agroecosystem performance during transition to certified organic grain production

Description:: Includes references
Author:: Delate, K. , Cambardella, C.A.
Subject:: organic production , Zea mays , corn , Glycine max , soybeans , Avena sativa , oats , Medicago sativa , alfalfa , crop rotation , grain yield , organic certification , cover crops , composts , soil amendments , insect pests , Ostrinia nubilalis , Cerotoma trifurcata , weeds , plant density , soil fertility , costs and returns , Iowa
Collection:: Journal Articles, USDA Authors, Peer-Reviewed
Year:: 2004

2. Bulk density as a soil quality indicator during conversion to no-tillage

Description:: In the special issue: Soil quality as an indicator of sustainable tillage practices / edited by D.L. Karlen.
Author:: Logsdon, S.D. , Karlen, D.L.
Subject:: no-tillage , ridge tillage , conventional tillage , soil quality , soil compaction , bulk density , soil water content , loess soils , crop management , continuous cropping , crop rotation , corn , Zea mays , soybeans , Glycine max , alfalfa , Medicago sativa , crop yield , landscape position , agricultural watersheds , Iowa
Collection:: Journal Articles, USDA Authors, Peer-Reviewed
Year:: 2004

3. Differential nitrogen-15 labeling of dairy manure components for nitrogen cycling studies

Description:: Includes references
Author:: Powell, J.M. , Wu, Z. , Kelling, K. , Cusick, P. , Munoz, G.
Subject:: dairy cows , cattle manure , nitrogen , biogeochemical cycles , stable isotopes , isotope labeling , Medicago sativa , alfalfa , Zea mays , corn , forage crops , corn silage , hay , ammonium sulfate , nutrient availability , nitrogen content , urine , feces , excretion , sandy loam soils , Udipsamments , Wisconsin
Collection:: Journal Articles, USDA Authors, Peer-Reviewed
Year:: 2004

4. Evaluating the spatial and temporal dynamics of farm and field phosphorus and potassium balances on a mixed crop and livestock farm

Description:: Includes references
Author:: Saporito, L.S. , Lanyon, L.E.
Subject:: soil nutrient balance , soil nutrients , soil fertility , phosphorus , potassium , spatial variation , temporal variation , input output analysis , crop production , dairy farming , farms , Zea mays , corn , Medicago sativa , Phleum pratense , Phalaris arundinacea , agricultural soils , Pennsylvania
Collection:: Journal Articles, USDA Authors, Peer-Reviewed
Year:: 2004

5. Sampling strategies for crop yield assessment within and among crop rotations

Description:: Includes references
Author:: Jaradat, A.A. , Archer, D.W. , Johnson, J. , VanKempen, S. , Wagner, S. , Eklund, J. , International Conference on Precision Agriculture (7th : 2004 : Minneapolis, Minn.).
Subject:: corn , Zea mays , soybeans , Glycine max , wheat , Triticum aestivum , alfalfa , Medicago sativa , crop rotation , cropping sequence , crop yield , plant growth , plant development , cropping systems , tillage , fertilizer application , soil chemical properties , multivariate analysis , Minnesota
Collection:: Journal Articles, USDA Authors, Peer-Reviewed
Year:: 2004