Browsing by Author "Duncan, E.R."
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Item Clovers for Minnesota(Minnesota Agricultural Experiment Station, 1952-06) Thomas, H.L.; Duncan, E.R.; Kernkamp, M.F.; Peterson, A.G.; Schmid, A.R.Item Soil fertility and conservation:A Minnesota Program(University of Minnesota, Agricultural Extension Service, 1947-03) Burson, Paul M.; Rost, C.O.; Duncan, E.R.Contains: 1. Drainage, land clearing and cultivation. 2. Liming acid soils. 3. Good crop rotations. 4. Conserving organic matter. 5. Adding commercial fertilizer. 6. Practicing erosion control,.