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Subjects United States Remove constraint United States: United States Subjects tillage Remove constraint tillage: tillage Subjects irrigation Remove constraint irrigation: irrigation

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1. Sampling error in U.S. field crop unit process data for life cycle assessment

Author:: Joyce Smith Cooper , Ezra Khan , Robert Ebel
Subject:: Agricultural Resource Management Survey , USDA , confidence interval , corn , crop production , data analysis , durum wheat , fertilizer application , field crops , foods , inventories , irrigation , life cycle assessment , nitrogen , oats , organic fertilizers , peanuts , pesticide application , pesticides , rice , sampling , seeds , soybeans , tillage , uncertainty , United States
Collection:: Journal Articles, USDA Authors, Peer-Reviewed
Year:: 2013

2. Technology improves tillage and soil treatment.

Author:: Army, T.J.
Subject:: tillage , soil treatment , agricultural machinery and equipment , technology , crop production , irrigation , soil erosion , United States
Physical description:: p. 304-308.
Collection:: Rural Development Publications Collection
Series:: Yearbook of agriculture
Part Of:: Yearbook of agriculture. 1987

3. The land is shaped by weather and climate.

Author:: Strommen, N.D. , McArdle, R.C.
Subject:: climatic zones , weather , land , wind , water , solar energy , crops , tillage , irrigation , United States
Physical description:: p. 238-242.
Collection:: Rural Development Publications Collection
Series:: Yearbook of agriculture
Part Of:: Yearbook of agriculture. 1987