134 EXPERIMENT STATION RECOED. 



analytical error." The higli protein seed introduced from Kansas produced a 

 crop lower than itself in protein content by about 2 per cent, but the difference 

 between that grown on the two soils was only 0.27 per cent, in favor of the Cali- 

 fornia soil. During the season 1908-9 the experiment was continued with very 

 similar results. 



Determinations of the alcohol-soluble nitrogen content indicate the same 

 change between the original used and the resulting product, but as between 

 the two plats the slight difference which occurred was generally in favor of the 

 Kansas soil. 



During 1908 a triangular soil exchange experiment was instituted in co- 

 operation with this Department. California soil, Kansas soil obtained from 

 the same place as that in the above experiments, and soil from the Arlington 

 experimental farm of this Department were used. The seed used was also 

 furnished by this Department. Tables state the chemical composition of the 

 soils and seed used and of the crops obtained during the seasons 1908-9, 1909-10, 

 and 1910-11. During each of these seasons the crops grown on the soil of the 

 Arlington farm was pinched and the kernels were small, thus rendering the 

 product incomparable with that grown on the other soils. 



The author regards the results thus far obtained as throwing less light than 

 would be desired upon " the primary question as to the influence of the soil 

 nitrogen upon the nitrogen content of the wheat as could be desired." It 

 appears that the soil nitrogen content has little if any direct influence on the 

 nitrogen content of the crop, but that some climatic factor entirely over- 

 shadows the soil factor. " Further, it appears that the nitrogen content of 

 an original seed when grown elsewhere than in a climate within which it has 

 been acclimated, has little or no influence upon its progeny, and that even 

 though it be acclimated still some seasonal climatic factor is sufficient either 

 to lower the nitrogen content of a high-gluten wheat or raise the nitrogen 

 content of a low-gluten original." 



Wheat, G. Roberts and E. J. Kinney {Kentucky Sta. Bui. 155, pp. 35-60). — 

 Among 42 varieties of wheat, many of which were tested each year except 1908 

 during the period 1905-1911, Jersey Fultz produced the highest 6-year average 

 yield of 34.5 bu. per acre, and had an average weight per bushel of 60 lbs., 

 and an average estimated milling quality of 93.7. Extra Early Oakley proved 

 a good variety for strong land and Harvest King and B-383, a hybrid wheat 

 furnished by this Department, also proved worthy of special mention. Among 

 the bearded wheats Kansas Mortgage Lifter, Fulcaster, and Lancaster Red are 

 especially recommended. 



Well-screened plump Harvest King seed yielded 29.5 bu. per acre as com- 

 pared with 26.3 bu. secured with the use of seed that had been slightly damaged 

 in the shock and was not well screened. " Our experiments for 2 years on the 

 rate of seeding seem to indicate that 6 pk. per acre produce the best results. 

 However, not enough work has been done that much importance can be attached 

 to the results." 



Cultural directions are followed by suggestions for the treatment of diseases. 



Wheat growing in Canada, the United States, and the Argentine, includ- 

 ing comparisons with other areas, W. P. Ruttek (London, 1911, pp. X+315, 

 j)ls. 2, figs. 31). — The topics discussed in this work are the geographical dis- 

 tribution of wheat in America ; the influence of soil, climate, and other factors 

 affecting the yield and quality; classiflcation of American wheats, and the 

 division of American wheat fields on a climatic and soil basis ; the cultivation, 

 harvesting, storing, marketing, and transportation of the crop ; yield and cost 

 of production ; price, acreage, production, and exportation ; and the possibilities 

 and probabilities of wheat in America. 



The book contains a bibliography of several pages. 



