Maintenance of crop production on semi-arid soil
Sievers, J.F., Holtz, H.F.
Maintenance of crop production on semi-arid soil - Washington 1927 - 1-29 p. - Crop, Soil, Production Washington Agriculture Experiment Station. Popular Bulletin No. 138 .
Maintenance of crop production on semi-arid soil - Washington 1927 - 1-29 p. - Crop, Soil, Production Washington Agriculture Experiment Station. Popular Bulletin No. 138 .