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1. Long-term tillage and cropping systems affect bulk density and penetration resistance of soil cropped to dryland wheat and grain sorghum

Description:
Includes references
Author:
Unger, P.W. , Jones, O.R.
Subject:
agricultural soils , bulk density , soil penetration resistance , resistance to penetration , stubble mulching , minimum tillage , no-tillage , dryland farming , Triticum aestivum , Sorghum bicolor , clay loam soils , crop rotation , slope , depth , soil water content , soil strength , dry environmental conditions , regression analysis , equations , Great Plains region
Collection:
Journal Articles, USDA Authors, Peer-Reviewed
Year:
1998

2. Soil bulk density, penetration resistance, and hydraulic conductivity under controlled traffic conditions

Description:
Includes references
Author:
Unger, P.W.
Subject:
bulk density , soil penetration resistance , hydraulic conductivity , controlled traffic systems , soil water content , soil organic matter , no-tillage , crop residue management , tillage , Triticum aestivum , wheat , Sorghum bicolor , grain sorghum , crop rotation , irrigation , furrows , clay loam soils , Texas
Collection:
Journal Articles, USDA Authors, Peer-Reviewed
Year:
1996

3. Surface soil physical properties after 36 years of cropping to winter wheat

Description:
19 ref.
Author:
Unger, P.W.
Subject:
Triticum aestivum , winter wheat , continuous cropping , dryland farming , clay loam soils , tillage , cropping systems , soil aggregates , aggregate stability , soil organic matter , soil mechanical properties , soil penetration resistance , bulk density , Texas
Collection:
Journal Articles, USDA Authors, Peer-Reviewed
Year:
1982