FIELD CROPS. 233 



yields, 36.15, 36, and 35.88 bushels per acre, respectively. The 15 varieties 

 tested averaged 31.74 bushels per acre. A measured acre given special attention 

 yielded 80 bushels of shelled corn, 800 pounds pulled fodder, and 1,320 pounds 

 topped plants. 



In a nitrogen test a basic formula was supplemented by different fertilizers 

 in quantities that furnished the same amount of nitrogen each. The cotton 

 meal, nitrate of soda, and sulphate of ammonia plats yielded 42.1, 43.04, and 

 44.46 bu.shels of shelled corn per acre, respectively, as compai'ed with 37.22 

 bushels yielded by the no-fertilizer plats. On land previously sown to oats, 

 then to cowpeas, applications of the same basic formula were followed by yields 

 of 38.36 and 38.79 bushels of shelled corn per acre, respectively, when supple- 

 mented by cotton meal and tankage. A half cotton meal and half tankage 

 addition to the basic formula yielded 40.57 l)u.shels per acre. 



Seed from the butts, tips, and middies of the ears yielded 35.22, 36.7, and 32.92 

 bushels i)er acre, re.spectively. Two stalks per hill yielded 56.16 bushels per 

 acre as compared with 42.21 bushels when only one stalk was planted per hill. 

 The Williamson method produced in a three-year test an average of 32.62 

 bushels as compared with 34.18 bushels obtained by the ordinary method. The 

 cultural and other methods used in each of these experiments are stated in full. 



Cotton, E. DE WiLDEMAN ET AL. (Rcv. EcoH. IntcriHit., 8 {1911), II, No. 1, pp. 

 215). — A series of articles by different iiuthors on the following subjects: 

 The uses of the cotton plant and its improvement, the culture of cotton in the 

 various countries of the world, the world's production and consumption of 

 cotton, the cotton industry and the periodical crises of overproduction, the 

 International Federation of Cotton Spinner's and Manufacturer's Associations, 

 financial affairs with reference to the industry, the history of inventions used 

 in cotton culture and manufacture, and the history of cotton transiwrtation. 



Report on the present position of cotton cultivation, W. K. Dunstan 

 (London: Intcrnat. Anaoc. 7'/o/>. Agr. and Colon. Development, I'JIO, pp. 58). — 

 Summaries are given of reports on cotton cultivation in the cotton-producing 

 countries or colonies of the world. 



Cotton production, M. V. Calvin (Georgia Sta. Bui. 9-i, pp. 159-164). — In a 

 test of 33 cotton varieties averaging 1,894 pounds of seed cotton per acre 

 McElhenny Cleveland and J. R. Cleveland Improved produced the highest 

 yields, 2,256 and 2,206 ix)unds per acre. 



In a nitrogen test cotton meal, nitrate of soda, and sulphate of ammonia plats 

 yielded 1,246.18, 1,269.72, and 1.297.94 ixiunds of seed cotton per acre, respec- 

 tively, as compared with 963.04 pounds on the no-fertilizer plats. This is 

 a repetition of an experiment conducted the previous year (E. S. R., 22, p. 635), 



Applications of 33 pounds of muriate of potash and 132 pounds of kainit in 

 mixtures otherwise identical were followed by yields of 1,671.29 and 1,603.76 

 pounds of seed cotton per acre as compared with 1,330.68 pounds on the no- 

 fertilizer plats. In another test applications of cotton meal and tankage were 

 followed by yields of 1,824.47 and 1,873.04 pounds of seed cotton per acre as 

 compared with 1,867.32 pounds after a mixture of the two materials, and 

 1,647.88 pounds on the nonfertilized plats. 



The cultural and other methods used in each of these experiments are stated 

 in full. 



Effect of different fertilizing" materials upon the maturity of cotton, C. B. 

 Williams (Xorth Carolina Sta. Rpt. 1909, pp. 37-40).— In about 30 tests of 

 fertilizing materials combined in different proportions and applied in different 

 quantities a hastening of maturity was invariably observed, and in most cases 

 the greater the yield the greater was the percentage of the total crop which 

 was obtained at the first two pickings. At these first two pickings the sandy and 



