Affiliation: | 1. Division of Fruit and Vegetable Crops and Diseases, Bureau of Plant Industry Station, Beltsville, Md. 2. Division of Soil and Fertilizer Investigations, Bureau of Plant Industry, USA 3. New Jersey Agricultural Experiment Station, New Brunswick, N. J. 4. Maine Agricultural Experiment Station, Orono, Maine 5. Division of Soil and Fertilizer Investigations, Bureau of Plant Industry Station, Beltsville, Md.
|