Campbell, C. E. An economic study of tomato production for canning in Arkansas. Ark. Exp. Sta. Bul. 225. 1928.
Walker, W. P. An economic study of the production of tomatoes in Maryland. Md. Exp. Sta. Bul. 304. 1929.
Montgomery, T. M. Jr., and Efferson, J. N. A cost of production study of tomatoes in North Louisiana, 1939. La. Exp. Sta. Bul. 329. 1941.
Carncross, J. W., Cathcart, C. S. et al. Economic review of New Jersey Agriculture. Ext. Service No. 72. pp. 89-96. 1931.
Carncross, J. W. and Nissley, C. H. New Jersey Can-house tomato production. Costs and recommendations for 1932. N.J. Ext. Bul. 96. 1932.
Hawthorne, H. W. Cost of production of tomatoes (20 states 1913-1934) Mimeo. Bul. of Agr. Eco., U.S. Dept. of Agr., Nov. 1936.
[1] Hoagland, D. R. and Arnon, D. I. The water culture method for growing plants without soil. Calif. Exp. Sta. Cir. 347. Dec. 1938.
[2] Arthur, J. M., Guthrie, J. D. and Newell, J. M. Some effects of artificial climates on the growth and chemical composition of plants. Amer. Jour. Bot. 17:416-482. 1930.
[3] Smith, Ora and Cochran, H. L. Effect of temperature on pollen germination and tube growth in the tomato. Cornell Memoir 175. 1935.
[4] Howlett, F. S. Use of chemicals to stimulate fruitfulness in tomatoes. Veg. Growers Asso. of America Rept. 1941, pp. 203-214. 1941.
Zimmerman, P. W. and Hitchcock, A. E. Formative effects induced with B-Naphthoxyacetic acid. Contribution from Boyce Thompson Inst. Vol. 12 #1, April-June, 1941.
[5] Fertilizer recommendations are best given in form of pounds per acre of nitrogen (N), phosphoric acid (P_{ 2}O_{ 5}) and potash (K_{ 2}O). These figures are then translated into pounds per acre of materials or of mixed fertilizers.
[6] Kraus, E. J. and Kraybill, H. R. Vegetation and reproduction with special reference to the tomato. Oreg. Bul. 149. 1918.
[7] Work, Paul. Nitrate of Soda in the nutrition of the tomato. Cornell Memoir 75. 1924.
[8] Murneek, A. E. The effects of fruit on vegetative growth in plants. Amer. Soc. Hort. Sci. Rpt. 1924, pp. 274-276.
[9] MacGillivray, J. H. Effect of phosphorus on the composition of the tomato plant. Jour. Agr. Res. 34: 97-127. 1927.
[10] Hepler, J. H. and Kraybill, H. R. Effect of phosphorus upon yield and maturity of the tomato. N. H. Tech. Bul. 28. 1925.