Fertilizers for sweetpotatoes based on investigations in North Carolina
Skinner, J.J., Williams, C.B., Mann, H.B.
Fertilizers for sweetpotatoes based on investigations in North Carolina - Washington 1932 - 1-46 p. - Fertilizers, Sweetpotatoes, Investigations United States Department of Agriculture. Technical Bulletin No. 335 .
Fertilizers for sweetpotatoes based on investigations in North Carolina - Washington 1932 - 1-46 p. - Fertilizers, Sweetpotatoes, Investigations United States Department of Agriculture. Technical Bulletin No. 335 .