Symptoms on field-grown tobacco characteristic of the deficient supply of each of several essential chemical elements
McMurtrey, J.E.
Symptoms on field-grown tobacco characteristic of the deficient supply of each of several essential chemical elements - Washington 1938 - 1-31 p. - Symptoms, Tobacco, Chemicals United States Department of Agriculture. Technical Bulletin No. 612 .
Symptoms on field-grown tobacco characteristic of the deficient supply of each of several essential chemical elements - Washington 1938 - 1-31 p. - Symptoms, Tobacco, Chemicals United States Department of Agriculture. Technical Bulletin No. 612 .