Cooperative studies on the effects of height of ridge, nitrogen supply, and time of harvest on yield and flesh color of the Porto Rico sweetpotato - Edmond, J. B. (Joseph Bailey), 1896- (Washington, U.S. Govt. Print. Off., 1950)
Caption title.
Joint contribution from South Carolina Agricultural Experiment Station, Texas Agricultural Exdperiment Station, Georgia Coastal Plain Experiment Station, and Bureau of Plant Industry, Soils and Agricultural Engineering.
"Literature cited": p. 40.
Keywords: Sweet potatoes -- Research