1. Chiseling influences on soil hydraulic properties;Allmaras;Soil Sci. Soc. Am. J.,1977
2. Soil acidification from long-term use of ammonium type nitrogen fertilizers;Allmaras,1978
3. Land Resource Regions and Major Land Resource Areas of the United States;Austin;U.S. Dep. Agric. Handbook 296,1965
4. Biological Control of Plant Pathogens;Baker,1974
5. Soil Physics;Baver,1972