1. On farm assessment of soil quality in California's Central Valley;Andrews;Agron. J.,2002
2. Labor Saving Technologies and Practices for Farming and Household Activities in Eastern and Southern Africa;Bishop-Sambrook,2003
3. Bulk density;Blake,1986
4. Priority setting in agricultural biotechnology research: supporting public decisions in developing countries with the analytic hierarchy process;Braunschweig,2000
5. Soil erosion and agriculture;Cerda;Soil Tillage Res.,2009