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Land tenure and the adoption of conservation practices
Soule, Meredith J., (2000)
Honorierung ökologischer Leistungen - Erfahrungen mit dem US-amerikanischen "Conservation Reserve Program" (CRP)
Plankl, Reiner, (1999)
Energy and the use of conservation tillage in US agriculture
Uri, Noel Dean, (1999)
Agricultural and multidisciplinary research
Young, Douglas L., (1995)
Biofuels : political/economic boondoggle or energy salvation for Western States?
Young, Douglas L., (2009)
Yield-topsoil depth response functions : linear versus Mitscherlich-Spillman
Hoag, Dana L., (1983)