Developing Technology With Farmers : A Trainer's Guide
Farming in Nature's Image : An Ecological Approach to Agriculture
Perennial Weeds : Characteristics and Identification of Selected Herbaceous Species
Education Through Cooperative Extension
Soil Science : Methods and Applications
Genetics and Conservation of Rare Plants
Soil Quality and Agricultural Sustainability
Handbook of Plant Virus Diseases
Agrochemicals : Preparation and Mode of Action
Soil Nutrient Bioavailability : A Mechanistic Approach
Crop Production : Evolution, History, and Technology
Physical Nonequilibrium in Soils : Modeling and Application
Grass Varieties in the United States
Soils and the Environment : An Introduction