Strip cropping for soil conservation
Kell, W.V., Brown, G.F.
Strip cropping for soil conservation - Washington 1937 - 1-40 p. - Soil, Conservation United States Department of Agriculture. Farmers Bulletin No. 1776 .
Strip cropping for soil conservation - Washington 1937 - 1-40 p. - Soil, Conservation United States Department of Agriculture. Farmers Bulletin No. 1776 .