Nutrient Cycling in Agroecosystems · 1992 · 36 citations · 5 references
AgricultureAgronomyOrganic AgricultureCrop ProductionOrganic Crop ProductionSoil Organic MatterFertigation ManagementFertilizer ManagementFertilizer SourcesNitrogen CycleNitrogen ManagementOrganic Nutrient SourcesBiological Nitrogen InputNitrogen Source UtilizationOrganic Farming SystemsOrganic Nitrogen SourcesPlant-available Nitrogen
5
Organic Farming in the Corn Belt
William Lockeretz, Georgia Shearer, Daniel H. Kohl · Science · 1981 · 268 citations
Crop Production During Conversion from Conventional to Low‐Input Methods
William C. Liebhardt, R. W. Andrews, Richard R. Harwood et al. · Agronomy Journal · 1989 · 173 citations
Agriculture, Agronomy, Crop Sciences +15