No. 1, August, 1921] AGRONOMY 9 



56. Thorne, C. E. Thirty-eighth annual report of the Ohio Agricultural Experiment 

 Station. Ohio. Agric. Exp. Sta. liull. 3o.S. 7-~Sl. 191'J.— In this report tiic director gives the 

 work and publications of the various departments of the Station for the year 1918^19. — R. C. 

 Thomas. 



57. Thorne, C. E., and Gary W. Montgomeuy. County experiment farms in 

 Ohio, Ohio Agric. Exp. Sta. Bull. 344. 22S-478. 1920.— An account is presented of the 

 rotation and fertilizer experiments carried on at 9 sub-stations. The work reported includes: 

 Drainage experiments at the Clermont County farm; variety tests of corn, oats, soybeans, 

 and wheat at the Hamilton County farm; variety tests of silage corn at the Trumbull County 

 farm; and at the Washington County farm special attention was paid to vegetable gardening, 

 especially to utility work with cabbage, tomatoes, and sweet corn. The crops used in the 

 various rotations were corn, oats, wheat, clover, soy beans, tobacco, potatoes, sugar beets, 

 alfalfa. — R. C. Thomas. 



58. TiCE, C. The potato in British Columbia. British Columbia Dept. Agric. Bull. 86, 

 75 p. ,78 fig. 1921. An information bulletin for growers. It contains a chapter on diseases. — 

 J. W. Eastham. 



59. TscHERMAK, Erich. Massnahmen zur Gewinnung grosserer Mengen vonMutterkom. 

 [Measures for securing larger amounts of Ergot.] Mitteil. Deutsch. Landw. Gcs. 36: 184-185. 

 1921. — Owing to the high prices paid by dealers in drugs it has become profitable to save the 

 ergot. The author points out that any condition tending to decrease or delay fertilization of 

 the rye, increases the chances for the production of ergot, and he makes some practical sugges- 

 tions to that end. — A. J. Pieters. 



60. Venkatraman, T. S., and R. Thomas. The care and treatment of new sugarcane 

 importations. Agric. Jour. India 16: 24-31. PI. 2-^. 1921.^ — The packing of cane pieces for 

 shipment is described and the methods of preliminary germination and necessary precautions 

 against ants are discussed.- — /. /. Skinner. 



61. WiMMER, G. tJber den jetzigen Stand unserer Kenntnisse und Erfahrungen in der 

 Tabakdiingung. [Concerning the present state of our knowledge and experience in tobacco 

 fertilizing.] Mitteil. Deutsch. Landw. Ges. 36: 166-167. 1921.— A general statement of cur- 

 rent information. — A. J. Pieters. 



62. Zade, Das Knaulgras. [Orchard grass.] Arbeit. Deutsch. Landw. Ges. 305. 69 

 p. 1920. — Two species of Dactylis are recognized as occurring in middle Europe, D. glomerata 

 L. and D. Aschersoniana Graebner; the author concerns himself with the former. Twelve 

 varieties have been described but culture tests have shown that they are not constant. The 

 botanical characters and morphology of the species are described, especially the inflorescence, 

 of which several types are illustrated. Much space is devoted to a discussion of germination. 

 Hand-gathered orchard-grass seed respond to a sudden and sharp fluctuation in temperature. 

 This is not so much the case with seed that have been thrashed or sweated. In field practice 

 not more than 20 per cent of the viable seed can be counted on to produce plants. Culture, 

 feeding value, climatic adaptation, and fertilizers are discussed briefly. Seed production is 

 treated at some length. It is said that for conditions in Germany the home-grown seed is 

 best. In the chapter on breeding attention is called to the difficulty of obtaining a pure line, 

 because no seed can be secured from single select plants by self-pollination. The author's 

 method is. therefore, to start the breeding work with 2 selected plants as nearly alike morpho- 

 losically and physiologically as possible. — A. J. Pieters. 



