1917] FIELD CROPS. 445 



Feeding tests noted from several sources indicate that this crop compares 

 favorably with alfalfa and is an excellent feed for cattle and sheep. An acre 

 of sweet clover will ordinarily support 20 to 30 shotes. 



Instructions are given for the production of sweet clover hay and for the 

 preservation of sweet clover as silage. 



[Tobacco], D. Aegerio (Rev. Min. Indus. Uruguay, 4 (1916), No. 20, pp. 27- 

 5S, figs. 12). — A general discussion of tobacco growing in Uruguay, with notes 

 on the production of seedlings, transplanting, cultivation, harvesting, and 

 yields. 



Tobacco culture in Albajiia, A. Baldacci (Bol. Tec. Coltiv. Tabacchi 

 [Scafati], 15 (1916), No. 1-2, pp. 3-28).— A general discussion of tobacco cul- 

 ture in Albania and adjacent territory, especially as regards locally adapted 

 varieties and general methods of cultivation. 



Velvet beans: How to grow and use, C. B. Whxiams (North Carolina Sta. 

 Circ. S5 (1917), pp. 4. fig- !)• — The production and use of velvet beans are 

 briefly discussed, and varieties recommended for forage and seed production for 

 different soil conditions. 



Spring wheats, R. H. Btften (Jour. Roy. Agr. Soc. England, 76 (1915), pp. 

 37-48, figs. 5). — The production of spring wheat in England and western 

 Europe and the economic value of spring wheat as compared with the crops 

 now in vogue are discussed, and a number of the more important spring wheat 

 varieties available for use in these regions noted. 



Red Fife, Burgoyne Fife, and Marquis are recommended as being superior to 

 other varieties for early sowing. With Nursery and Red Marvel available 

 for seeding late in February, Marquis and April Bearded can be safely sown 

 as late as March. 



A new hybrid yellow wheat, G. Gaudot (Jour. Agr. Prat., n. ser., 28 (1915), 

 No. 58, p. 581, fig. 1; abs. in Internal. Inst. Agr, [Rome], Mo. Bui. Agr. Intel, 

 and Plant Diseases, 6 (1915), No. 12, pp. 1621, 1622).— A new wheat hybrid 

 named Ceros, obtained by crossing Yellow Briquet with Autumn Victoria, is de- 

 scribed. It has been grown ten years under varying conditions of soil and cli- 

 mate, and is reported to be perfectly hardy and remarkably rust-resistant. 



On growing two white-straw crops in succession, E. J. Russell (Jour. Bd. 

 Agr. [London], 22 (1915), No. 6, pp. 533-5^2, fig. 1 ; abs. in Internal. Inst. Agr. 

 [Rome], Mo. Bui. Agr. Intel, and Plant Diseases, 6 (1915), No. 12. p. 1619). — 

 In an effort to determine to what extent fluctuations in yield are liable to occur 

 in continuous wheat growing, the author compared the results obtained from 

 the continuous wheat and barley plats of the Rothamsted Experimental Station. 



It was found that the yields varied much more on the plats receiving artificial 

 fertilizers than on those receiving farmyard manures. In a favorable season 

 the yield increased to a greater extent by artificial fertilizers than by farmyard 

 manure, but in unfavorable seasons the conditions were reversed. Wheat in 

 rotation with clover gave higher yields and less variation than when grown 

 continuously, so that continuous growing is deemed justifiable only where the 

 cost of production is low or the prices high. 



Two conditions essential to success are that the land be clean and that a 

 suitable spring top-dressing be applied. The top-dressing will be determined 

 by the needs of the second crop. Where the tilth is unsatisfactory soot or 

 ammonium sulphate is recommended ; otherwise, sodium nitrate. 



Agriculture and the wheat supply, E. J. Russell (Nature [London], 98 

 (1916), No. 2458, pp. 269-271). — This is a general discussion of the ways and 

 means of increasing the production of home grown wheat in England. 



