FIELD CROPS. 831 



duction of corn in Manitoba and describes implements to be used, styles of 

 silos, and silo tilling. 



Annual report of the Nebraska Corn Improvers' Association (Ann. Rpt. 

 'S'chr. Corn Improvers' Ansae, 4 {I'JIS), pp. JJ.'f, figs. 6). — Tliis report contains 

 among other data 15 papers on corn and wheat growing and related subj%:ts, 

 including some results given by W. M. Jardine of seed-bed preparation experi- 

 ments conducted at the Kansas Experiment Station since 1907, from which 

 " the main conclusion to be drawn is that large quantities of nitrates, or plant 

 food as indicated by nitrates, are developed and stored in the soil as a result 

 of early seed-bed preparation." Tabulated results for 11)11-12 show that the 

 wheat yields varied on the same scale as the nitrogen content of the soil to a 

 depth of 3 ft, when determined in the spring and the fall of each year, for 

 each of 10 methods of seed-bed preparation. 



Report of variety tests of cotton for 1913, and a summary of results for 

 the past eleven years, R. Y. Winters {North Carolina Sta. Bid. 226 (1014), 

 pp. IS). — The results of tests at 3 locations showed that "at the experiment 

 station farm the short staple varieties ranged In yield between 434.5 and 1,045 

 lbs. of seed cotton per acre. The 54 short staple varieties produced an average 

 yield of 709 lbs. of seed cotton or 804 lbs. of lint and 405 lbs. of seed. The 15 

 long staple varieties ranged in yield between 479.5 and 927 lbs. of seed cotton, 

 giving an average yield of 774 lbs. of seed cotton, or 264.5 lbs. of lint and 509 

 lbs. of seed." 



" The 47 varieties of short staple cotton grown at the Edgecombe farm ranged 

 in yield between 1,200 and 540 lbs. of seed cotton jxr acre. The varieties on 

 this farm produced an average yield of 849 lbs. of seed cotton, or 313 lbs. of 

 lint and 536 lbs. of seed per acre. The long stiple varieties ranged in yield 

 between 9S0 and 540 lbs. of seed cotton per acre and produced an average yield 

 of 700 lbs. of seed cotton or 228 lbs. of lint and 472 lbs. of seed per acre." 



At the Iredell farm, " ranging in yield from 300 to 1,560 lbs. of seed cotton 

 per acre, the short staple varieties gave an average yield of 944 lbs. of seed 

 cotton or 307 lbs. of liut and 577 lbs. of seed per acre. The above is a much 

 broader range in yield than was secured at either of the other farms. Both 

 the maximum and minimum yields exceeded the range of the other two. The 

 long staple varieties ranged in yield between 350 and 900 lbs. of seed cotton 

 per acre and produced an average yield of 768 lbs. of seed cotton or 263 lbs. 

 of lint and 505 lbs. of seed." 



Some of the best yielding varieties are noted to be Hawkins Extra Prolific, 

 Shine Early Prolific, King Improved, and Cook Improved. 



The Knapp method of g-rowing cotton, W. B. Mebcieb and H. E. Savely 

 (Garden City and New York, 1913, pp. XV +208, pis. 33, figs. .4).— This book 

 gives a history and description of the cotton plant, and treats of climate, soil 

 culture, fertilizers, seed improvement, varieties, diseases and insect pests, har- 

 vesting, marketing, cost of production, equipment in teams and tools for cotton 

 farms, cotton by-products, and soil improvment. It also discusses the outlook 

 for the cotton industry and the supply and distribution of cotton. 



Standard tests for hemp, G. E. Anderson {Daily Cons, and Trade Rpts. 

 [U. S.], 16 {1913), No. 280, p. 1111).— This notes a method of standardizing 

 that is now being tested by the bureau of agriculture at Manila, in which the 

 breaking strength of a meter length of fiber is divided by its weight in grams. 

 It is hoped that the resulting gram-meter value will be an accurate index of 

 the comparative strength and quality of the fiber. 



Sisal hemp: Planting, manufacturing, and g'eneral management, D. J. 

 Stoddart {Jour. Jamaica Ayr. Soc., 17 {1913), Nos. 6,' pp. 17-20; 7, pp. 14-18, 

 pi. 1, fig. 1; 8, pp. 34, 35; 9, pp. 17-19; 10, pp. 12-14).— The hemp Industry is 



