434 EXPERIMENT STATION RECOItD. 



in progress as to improving the yield and earliness of corn Ity the selection of 

 seed from plants that bear normal ears on suckers. 



Detasseling of maize Giant of Servia, E. Heckel {Compt. Rend. Acad. 8ci. 

 [Parifi}, jfjD (191/,), No. 16, pp. 5<J')-597) .—Thin gives results of work along the 

 line of that previously noted (E. S. 11., 28, p. 225; 31, p. 44). 



The data show that ))y removing the tassel soon after it has expanded and 

 fertilization of the ear has been assured, a somewhat higher content of saccha- 

 rose and glucose was secured in the juice of the i)lant up to the early part of 

 September, after which date it declined rai)idly. A wide variation of this 

 property to store up sugar was observed in individual plants. It is noted that 

 the starch content fluctuated with the sugar content in the detasseled plants. 



Results with fertilizers for maize, M. Calvino (Bol. 8oc. Affr. Mexicanc, 

 3S U91J,), No. 41, pp. S05-809) .—Two tests carried out in the federal district 

 of Mexico show the advantage secured with commercial fertilizers, especially 

 with sulphate of ammonia. With bone meal, sulphate of potash, and gypsum 

 there was an increase in grain over the untreated ijlat of 10.3 per cent in one 

 case and 11.3 per cent in the other. On the addition of sulphate of ammonia 

 to the above treatment the yield was increased over the untreated plat by 37.9 

 and 3S.4 per cent, respectively. It is noted that these yields gave a gross profit 

 on the fertilizer investment of 2(X).65 per cent. 



Practical maize production, F. F. Matenaers (Dcr ratlonclle Maishaii. 

 Benin, 1914, PP- Xy-\-172, figs. 91). — This book describes methfxls employed in 

 the production of the corn crop in the United States. 



Sing'le-stalk cotton culture, O. F. Cook ill. S. Dept. Agr., Bur. Plant Indus. 

 Doc. 1130 {1914), pp. 11, figs. i2).— This bulletin gives results of tests with 

 Egyptian cotton at Bard, Cal., and Durango cotton at San Antonio, Tex., and 

 Norfolk, Va., showing the advantage of close (6 to 12 in.) spacing of the plants 

 and late thinning. 



" The genei'al result of the new system is to secure an earlier production of 

 flowers and bolls. When the new and old systems are compared by applying 

 them to alternate rows, there are striking differences of behavior. The advan- 

 tage is greatest, of course, under extreme conditions where the season of pro- 

 duction is shortened by drought, early frost, or the ravages of the boll weevil. 

 The rate of flowering of rows of single-stalk plants, as shown by daily counts 

 early in the season, has been found to average far above that of the interven- 

 ing rows of larger, many-stalked plants, the differences sometimes amounting 

 to from 40 to GO per cent. At the end of the season, correspondingly increased 

 yields are obtained from the single-stalk rows, in some cases over 50 per cent." 



See also a previous note (E. S. R., 31, p. 433). 



Cotton, its origin, uses, history, and importance, C. Steuckart {Die 

 BaumwoUe, Hire Herkunft, ihrc Tcncrudiing, iJirc Gcschiclifc, nnd Bedcutung. 

 Lchpsic, 1914, pp. 59, figs. 11). — The four chapters treat of cotton and its 

 industrial importance, the plant, the principal producing countries, and recent 

 efforts in the industry. 



Cost of producing cotton, N. C. Murray ( U. S. Dcpt. Agr., Farmers' Bui. 64I 

 {1914), PP- 12-14)- — This article summarizes the results of a study previously 

 noted (E. S. R., 11, p. 41). and of an inquiry in 1910, based upon estimates of 

 8G2 crop i-eporters, which indicated that " the average total cost per acre was 

 approximately $20.35, and the production of lint 247 lbs., making an average 

 cost of about 8.24 cts." 



It is noted that the cost per acre to different growers varies widely. The 

 average given includes some reporting the cost below $12 an acre and others 

 above $35. " However, the cost per acre to each individual varies only mod- 

 erately from year to year, there being a more or less gradual increase in the 



