LITERATURE CITED 



(1) Bedford, H. A. R., duke of, and Pickering, S. U. 



1919. science and fruit growing. 350 pp., illus. London. 



(2) Byars, L. P., and Gilbert, W. W. 



1920. SOIL DISINFECTION with hot water to control the root-knot 



nematode and parasitic soil fungi. U. S. Dept. Agr. Bui. 

 818, 14 pp., illus. 



(3) Chapman, G. H. 



1920. tobacco investigations. Mass. Agr. Exp. Sta. Bui. 195, 38 pp., 

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(4) Clinton, G. P. 



1920. NEW OR UNUSUAL PLANT INJURIES AND DISEASES FOUND IN CON- 

 NECTICUT. 1916-1919. Conn. Agr7 Exp. Sta. Bui. 222, pp. 

 396-482, illus. 



(5) Garner, W. W., Lunn, W. M., and Brown, D. E. 



1925. EFFECTS OF CROPS ON THE YIELDS OF SUCCEEDING CROPS IN THE 

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Research, vol. 30, pp. 1095-1132, illus. 



(6) Hartwell, B. L., Pember, F. R., and Merkle, G. E. 



1919. THE INFLUENCE OF CROP PLANTS ON THOSE WHICH FOLLOW. II. 



R. I. Agr. Exp. Sta. Bui. 176, 47 pp., illus. 



(7) Heald, F. D. 



1916. TOMATO BLIGHT A SERIOUS MENACE TO TOMATO INDUSTRY. Bet- 

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(S) Howard, A., and Howard, G. L. C. 



1915. THE IMPROVEMENT OF TOBACCO CULTIVATION IN BIHAR. Agr. 



Research Inst. Pusa Bui. 50, 19 pp., illus. 

 (9) Humphrey, H. B. 



1914. STUDIES ON THE RELATION OF CERTAIN SPECIES OF FUSARIUM 

 TO THE TOMATO BLIGHT OF THE PACIFIC NORTHWEST. Wash- 



Agr. Exp. Sta. Bui. 115, 22 pp., illus. 



(10) Johnson, J. 



1916. resistance in tobacco to the root-rot disease. Phytopa- 



thology, vol. 6, pp. 161-181, illus. 



(11) 1919. the fusarium root-rot of tobacco. (Abstract.) Phytopa- 



thology, vol. 9, p. 49. 



(12) 1924. tobacco diseases and their control. U. S. Dept. Agr. Bui. 



1256, 56 pp., illus. 



(13) and Hartman, R. E. 



1919. influence of soil environment on the root-rot of tobacco. 

 Jour. Agr. Research, vol. 17, pp. 41-86, illus. 



(14) Mac aire, H. 



1832. memoir pour server a l'histoire des assolements.. Mem. Soc. 

 Phys. et Hist. Nat. Geneve, tome 5, pp. 287-302. 



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