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Year 2004 Remove constraint 2004: 2004 Subjects crop yield Remove constraint crop yield: crop yield Subjects Iowa Remove constraint Iowa: Iowa

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1. 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

2. Crop condition and yield simulations using Landsat and MODIS

Description:: Includes references
Author:: Doraiswamy, P.C. , Hatfield, J.L. , Jackson, TJ. , Akhmedov, B. , Prueger, J. , Stern, A.
Subject:: Landsat , satellites , remote sensing , image analysis , corn , soybeans , crop yield , simulation models , leaf area index , canopy , reflectance , soil water content , thematic maps , field experimentation , Iowa
Collection:: Journal Articles, USDA Authors, Peer-Reviewed
Year:: 2004

3. Putative alleles for increased yield from soybean plant introductions

Description:: Includes references
Author:: Kabelka, E.A. , Diers, B.W. , Fehr, W.R. , LeRoy, A.R. , Baianu, I.C. , You, T. , Neece, D.J. , Nelson, R.L.
Subject:: Glycine max , soybeans , field crops , crop yield , high-yielding varieties , cultivars , alleles , genotype , plant genetic resources , genetic markers , microsatellite repeats , agronomic traits , quantitative trait loci , height , protein content , Illinois , Indiana , Iowa
Collection:: Journal Articles, USDA Authors, Peer-Reviewed
Year:: 2004

4. Simulating nitrate drainage losses from a Walnut Creek watershed field

Description:: Includes references
Author:: Bakhsh, A. , Hatfield, J.L. , Kanwar, R.S. , Ma, L. , Ahuja, L.R.
Subject:: Root Zone Water Quality Model , simulation models , agricultural soils , watersheds , nitrate nitrogen , losses from soil , subsurface drainage , drainage water , Zea mays , corn , Glycine max , soybeans , crop yield , water pollution , soil horizons , soil physical properties , soil texture , nitrogen , application rate , Iowa
Collection:: Journal Articles, USDA Authors, Peer-Reviewed
Year:: 2004

5. Soil surface property and soybean yield response to corn stover grazing

Description:: Includes references
Author:: Clark, J.T. , Russell, J.R. , Karlen, D.L. , Singleton, P.L. , Busby, W.D. , Peterson, B.C.
Subject:: corn stover , fields , grazing , beef cattle , winter , soil compaction , soil penetration resistance , bulk density , no-tillage , discing , Glycine max , soybeans , crop yield , silt loam soils , clay loam soils , crop rotation , Zea mays , soil aggregates , soil water content , surface roughness , Iowa
Collection:: Journal Articles, USDA Authors, Peer-Reviewed
Year:: 2004

6. Spatial analysis of forage grass trials across locations, years, and harvests

Description:: Includes references
Author:: Smith, K.F. , Casler, M.D.
Subject:: Bromus inermis , Dactylis glomerata , Panicum virgatum , Elytrigia , hybrids , forage grasses , cultivars , variety trials , spatial variation , crop yield , geographical variation , statistical analysis , mathematical models , equations , Wisconsin , Pennsylvania , Iowa , South Dakota , Nebraska , Oklahoma
Collection:: Journal Articles, USDA Authors, Peer-Reviewed
Year:: 2004