736 EXPERIMENT STATION EECORD. 



In 1910 the yields of seed cotton per acre secured in a test of 33 varieties 

 ranged from 1,4S9 lbs. to 2,250 lbs. and averaged l,S9-i lbs. In 1911, 2S varieties 

 were tested and the highest yielding variety as in 1910 was McElhenny Cleve- 

 land. A table states the yields given by each of the 33 varieties at their first, 

 second, and third pickings, in order to indicate their relative earliness. 



In the 3 years' nitrogen test an average yield of 1,320 lbs. of seed cotton per 

 acre was obtained from the cotton-seed meal plat, as compared with 1,367 lbs. 

 from the nitrate of soda, 1,416 lbs. from the sulphate of ammonia, and 940 lbs. 

 from the check plats. In an oat, pea, cotton rotation a 3 years' average of 

 1,634.39 lbs. per acre of seed cotton was secured from the cotton-seed meal 

 plats, as compared with 1.6S2.78 lbs. from the tankage, 1,648.67 lbs. from the 

 half tankage and half cottou-seed meal, and 1,364.32 lbs. from the check plats. 

 The use of muriate of potash was followed by a 3 years' average yield of 1,589 

 lbs,, as compared with 1,609 lbs. after the use of kainit. Rust develoi>ed during 

 only 1 year of the experiments and from this year's experience the author 

 advises the use of kainit on land which is subject to I'ust, but prefers the use 

 of muriate on other land because of the higher cost of kainit as a potash source. 



After 3 years' work the author feels warranted in stating that he believes a 

 variety of cotton immune to anthracnose can be produced. On the plats de- 

 voted to this woi'k he obtained a plant which had 66 matured bolls besides 

 blooms and squares, and yielded seed cotton at the rate of 1 lb. for each 45 bolls. 



Culture of Sea Island cotton in Cuba, H. P. Starrett (Daily Cons, and 

 Trade Rpts. [U. 8.], 15 (1912), No. Jfi, p. 727). — No trouble was experienced 

 with the boll weevil during 3 years' tests conducted to determine whether or 

 not such trouble would result from planting cotton in Cuba during September. 

 Sea Island cotton seed from Florida was planted the first year and all trash 

 was burned immediately after harvesting during each of the 3 years. .. 



Studies in Indian cotton, H. M. Leake (Jour. Genetics, 1 (1911), No. 3, pp. 

 205-272, pis. 2, figs. 6). — ^After a discussion of the genus Gossypium and the 

 monopodial and sympodial types used in this investigation, the author states 

 the results of expexnmeuts dealing with the color of the corolla, the red coloring 

 matter of the sap, the leaf factor, the type of branching, the length of the vege- 

 tative period, and the leaf glands. A discussion of the correlations observed and 

 a bibliogi-aphy of 23 titles are followed by 29 tables which present the correla- 

 tion and other numerical data obtained. 



Report on the manurial trials on cotton carried out on the state domains, 

 1910, F. Hughes and H. C. Jefferys (Agr. Jour. Egypt, 1 (1911), No. 1, pp. 

 8-16). — Physical and chemical analyses of the soils of the experiment fields 

 accompany tables stating the results of fertilizer and ginning tests of cottons. 



Chinese cotton production, G. E. Anderson (Daily Cons, and Trade Rpts. 

 [U. S.], 15 (1912), No. ^2, p. 752).— Statistical data on the acreage of cotton 

 grown in China and the amount imported and exported in recent years are fol- 

 lowed by the statement that " with cotton supplanting opium on many Chinese 

 farms, reduced imports and increased exports of cotton may be expected." 



Yield of potatoes under different methods of cultivation, K. K. Vasil'ev 

 (Selsk. Klioz. 1910, No. J/l; ahs. in Zhur. Opytn. Agron. (Riiss. Jour. Expt, 

 Landw.), 12 (1911), No. 3, pp. 1,25, 426).— At the Umau Agricultural School the 

 Early Rose potato was used in cultural tests during a number of years. 



The 3 years' average yields secured by planting 14 in. apart each way 

 were practically equal to those secured by planting 17^ in. apart each way 

 during a 5-year period, and somewhat greater than those secured by planting 

 21i in. apart each way during 6 years or 28 in. during 4 years. In wet years 

 planting 21 in. apart each way was followed by the higher yields while in dry 

 years 14 in. apart each way appeared the best distance. 



