Effect of time, depth and method of plowing upon yield and eradication of bienni
Wilkins, F.S., Collins, E.V.
Effect of time, depth and method of plowing upon yield and eradication of bienni - Iowa 1933 - 219-240 p. - Iowa Agricultural Experiment .
Effect of time, depth and method of plowing upon yield and eradication of bienni - Iowa 1933 - 219-240 p. - Iowa Agricultural Experiment .