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Authors Karlen, D.L. Remove constraint Karlen, D.L.: Karlen, D.L. Year 2004 Remove constraint 2004: 2004 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. Challenges of managing liquid swine manure

Description:
Includes references
Author:
Karlen, D.L. , Cambardella, C.A. , Kanwar, R.S.
Subject:
pig manure , liquid manure , animal manure management , land application , application rate , phosphorus , potassium , nitrogen , soil fertility , leaching , nutrient balance , tile drainage , crop rotation , Zea mays , corn , Glycine max , soybeans , soil nutrients , Iowa
Collection:
Journal Articles, USDA Authors, Peer-Reviewed
Year:
2004

3. Quantification of tillage and landscape effects on soil carbon in small Iowa watersheds

Description:
In the special issue: Soil quality as an indicator of sustainable tillage practices / edited by D.L. Karlen.
Author:
Moorman, T.B. , Cambardella, C.A. , James, D.E. , Karlen, D.L. , Kramer, L.A.
Subject:
ridge tillage , discing , plowing , soil erosion , soil quality , soil organic matter , carbon , spatial distribution , slope , landscape position , loess , sediment transport , soil water , agricultural watersheds , Iowa
Collection:
Journal Articles, USDA Authors, Peer-Reviewed
Year:
2004

4. Relationship of corn and soybean yield to soil and terrain properties

Description:
Includes references
Author:
Kaspar, T.C. , Pulido, D.J. , Fenton, T.E. , Colvin, T.S. , Karlen, D.L. , Jaynes, D.B. , Meek, D.W.
Subject:
Zea mays , corn , Glycine max , soybeans , grain yield , agricultural soils , soil chemical properties , soil physical properties , soil fertility , spatial variation , topography , fields , landscapes , 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. The soil management assessment framework: a quantitative soil quality evaluation method

Description:
Includes references
Author:
Andrews, S.S. , Karlen, D.L. , Cambardella, C.A.
Subject:
soil management , soil quality , soil types , land use , climatic factors , quantitative analysis , case studies , Georgia , Iowa , California , Oregon , Washington , Idaho
Collection:
Journal Articles, USDA Authors, Peer-Reviewed
Year:
2004

7. Using the late spring nitrate test to reduce nitrate loss within a watershed

Description:
Includes references
Author:
Jaynes, D.B. , Dinnes, D.L. , Meek, D.W. , Karlen, D.L. , Cambardella, C.A. , Colvin, T.S.
Subject:
watersheds , water pollution , pollution control , water quality , nitrate nitrogen , leaching , testing , tile drainage , surface water , chemical concentration , nitrogen fertilizers , fertilizer rates , application timing , Zea mays , corn , grain yield , statistical models , Iowa
Collection:
Journal Articles, USDA Authors, Peer-Reviewed
Year:
2004

8. Watershed-scale assessment of soil quality in the loess hills of southwest Iowa

Description:
In the special issue: Soil quality as an indicator of sustainable tillage practices / edited by D.L. Karlen.
Author:
Cambardella, C.A. , Moorman, T.B. , Andrews, S.S. , Karlen, D.L.
Subject:
soil quality , soil biological properties , soil chemical properties , soil physical properties , spatial distribution , ridge tillage , conventional tillage , long term effects , loess soils , silt loam soils , corn soils , continuous cropping , corn , Zea mays , hills , landforms , watersheds , Iowa
Collection:
Journal Articles, USDA Authors, Peer-Reviewed
Year:
2004