FIELD CROPS. 



443 



scarcely noticeable until after September 2. At Kiverhead the gain due to 5 

 sprayings was 19 bu. per acre and to 3 sprayings 8J bu. The plants suffered 

 from drought and were slightly injured by flea beetles, aphids, and early 

 blight, but there was no late blight or rot. 



" In 12 farmers' business experiments, including 218 acres, the average gain 

 due to spraying was 19.1 bu. per acre; the average total expense of spraying, 

 $4.04 per acre; and the average net profit, $4.39. In 3 of the experiments 

 spraying was unprofitable." 



Five volunteer experimenters averaged 68 bu. per acre in the gains reported. 

 Early blight was not destructive and little injury to foliage resulted from a 

 late outbreak of late blight, although it caused considerable loss from rot. 

 Colorado beetles, flea beetles, and tip burn were the chief source of trouble to 

 potato foliage in 1910. 



Dry weather tests potato spraying, F. H. Hall {New York State Sta. Bui. 

 338, popular ed., pp. 3-8). — This is a popular edition of the above. 



Better grain-sorghum crops, C. R. Ball (U. 8. Dept. Agr., Farmers' Bui. 

 448, pp. 36, figs. 13). — This bulletin gives "the best known methods of improv- 

 ing the grain-sorghum crops on the farms where they are grown." It deals 

 with the topography, soils, climate, and agricultural development of the grain- 

 sorghum belt, the history, uses, and statistics of the crop, and the methods of 

 improving it in drought resistance, earliness, dwarfness, and productiveness. 

 Earlier papers on the same subject by this author have already been noted 

 (E. S. R., 22, p. 729; 28, p. 140; 24, p. 734). 



Transmission of the nitrogen content in the sugar beet, J. Urban (Ztschr. 

 Zuckerindus. Bohmen, 35 (1911), No. 8, pp. 443-450). — The studies made by 

 the author indicated that the nitrogen content of the sugar beet may be trans- 

 mitted in a manner similar to the sugar content. The nitrogen content of the 

 plants was not always in direct correlation with the sugar content. The 

 author suggests that in improving the sugar beet by means of breeding, the 

 nitrogen content as well as the sugar content should be taken into consideration, 

 as this is a step in the direction of securing greater purity in the juice. 



Wheat cultivation in tropical Africa (Agr. Jour. Morambique, 1 (1911), 

 No. 1, pp. 9-13). — A brief statement of the progress made in wheat cultivation 

 in British East Africa is followed by a report of the results of commercial 

 valuations and data as to the composition of samples of wheat grown in differ- 

 ent parts of the world. 



The results of chemical analyses are summarized in the following table: 



Gluten and gliadin contents of wheat grown in various countries. 



Variety. 



Grown in — 



Gluten. 



Gliadin. 



Gluyas 



Bob Rust-proof . 



Gluyas 



Rietta 



Durum 



Mixed hard and soft . . 



British East Africa 



do 



East Africa Protectorate 

 do 



Uganda 



fKano 



tZaria 



Statistical investigations of structural variation in cereal plants, Quante 

 (Landw. Vers. Stat., 74 (1910), No. 1-2, pp. 121-162, fig. i).— The statistical 

 method and its application is discussed and examples are given showing how 

 different factors, such as length of spike, length of stem, weight of kernel, and 

 others are treated. The author states that for the exact description of measur- 

 able factors in cereal plants the average as determined from a single series of 



