Browse on keywords: erosion ID BMP
Search results on 09/19/18
1086. Brooks, R.O. and E.L. Michalson. 1983. An evaluation of BMP's in the Cow Creek watershed of Latah County, Idaho.. ID Agr. Expt. Sta. Research Bull. #127.
Eight BMP's were evaluated. Major farm income loss occurred when soil erosion was reduced below 6 T/ac./yr. This required minimum tillage and a rotation change from wheat-barley-fallow to wheat-barley-peas.
5353. Powell, M.L. and E.L. Michalson. 1985. An evaluation of best management practices on dryland farms in the lower portion of the Upper Snake River Basin of southeastern Idaho.. ID Agr. Expt. Sta. Bull. #639.
Where annual precipitation is <16", each inch of topsoil lost may reduce wheat yields 1 to 3 bu/ac. Four BMP's are examined: residue management, terracing, strip cropping and grass waterways. Terraces increase costs ~10%. WW (25%) - fallow (25%) - spring barley was most profitable rotation for all farm sizes. Minimum till was first choice for small and large farms, with strip cropping for medium farms. Maximum use of BMP's reduced soil loss 61% to 2.3 T/ac., with a reduction in net returns averaging 36%.