TY - REP AU - Koelliker,J.K. ED - National Symposium on Conservation Systems. Hyatt Regency Chicago, Illinois Center (USA). 14-15 Dec 1987 TI - Choosing optimum moisture conservation systems for the Great Plains SN - 09-161-50895 U1 - 89-011811 PY - 1987/// KW - America KW - Analysis KW - Methods KW - North America KW - Organization, administration and management of agricultural enter KW - Soil water KW - USA KW - Western states usa T2 - Optimum erosion control at least cost: proceedings of the national symposium on conservation systems. St. Joseph, Mich. (USA). American Society of Agricultural Engineers. 1987. p. 131-140 ER -