1. The influence of soil characteristics and nutrient input on dry matter production of maize and the emissions of ammonia and nitrate;Aarts,1990
2. Towards a typology for agricultural land use in the Netherlands;Bouwman,1997
3. Optimal spatial management of agricultural pollution;Braden;American Journal of Agricultural Economics,1989
4. Implications of alternative policies on nitrate contamination of groundwater;Chowdhury;Journal of Agricultural and Resource Economics,1996