FIELD CROPS. 37 



Silver King-. — A corn for northern Iowa, H. D. Hughes {loioa Sta. Bui. 

 1S8, pp. 75-95, figs. 11). — This bulletin gives the development and early history 

 of Silver King corn and sets forth its exceptional value for cultivation in 

 northern Iowa. Records obtained froan grow(>rs in Wisconsin, covering a 

 period of 5 years, show an average yield of 59.2 bu. per acre, which is an 

 average of 10.9 bu. more than other varieties. This pedigreed corn has been 

 produced at the Iowa Station and about 150 bu. will be distributed among 

 farmers of northern Iowa. 



Corn culture in North Carolina, J. L. Bubgess {Bui. N. C. Dept. Agr., SS 

 {1912), A'c». 6, Sup., pp. 54). — This bulletin discusses the black, gray, red, and 

 mountain soils of the State in their connection with coni production, green 

 manuring, conservation of moisture, selection and preparation of the seed, plant- 

 ing, cultivating and harvesting, rotations, corn judging, and varieties. 



In the variety tests those giving the best results in the coastal plains were 

 Cocke Prolific, Biggs Seven-ear, Southern Beauty, and Hickory King; and in the 

 Piedmont section. Weekly Improved, Southern Beauty, and Cocke Prolific. 



Notes on corn growing- in Guam, J. B. Thompson (Ouam Sta. Rpt. 1912, 

 pp. 22-24)' — The primitive methods of planting and harvesting corn followed 

 by the natives in Guam are described. It is noted that a yield of 27.75 biL 

 per acre was obtained at the station, which was better than the average crop 

 grown in Guam. 



Notes are given on variety tests that Include over 40 varieties of widely 

 varying types originating in India, Ceylon, Burma, Formosa, Ecuador, and 

 Colombia. The small-grained types from southern Asia required from 200 to 

 220 kernels to weigh 1 oz. while a variety from Ecuador required only 55 

 kernels. No. 576, a variety from the island of St. Vincent, is noted as having 

 characteristics, notably early maturity, making it especially suited to Guam 

 conditions. 



Twelfth annual report of the Indiana Corn Growers* Association, edited 

 by G. I. Christie (Ann. Rpt. Ind. Corn Growers' Assoc, 12 {1912), pp, 94y 

 figs. 22). — This report includes addresses on alfalfa by A. P. Grout, A. T. 

 Wiancko, J. N. Dyer, and M. Douglas, on corn by P. E. Goodrich and D. F. 

 Maish, and on vetch by M. L. Fisher. 



Fourth annual report of the Ontario Corn Growers' Association, J. S. Dutf 

 (Ann Rpt. Ontario Corn Grotcers' Assoc, 1911, pp. 34, figs. 16). — This includes 

 addresses on corn growing for profit, silage feeding, the improvement of the 

 corn crop, and alfalfa as a soil builder. 



Rubelzul cotton: A new species of Gossypium from Guatemala, F. L. 

 Lewton {Smithsn. Misc. Collect., 60 {1912), No. 4, pp. 2, pis. £).— This is a 

 description of Gossypium irenwum. found a few miles from SenahG in Alta 

 Verapaz. Gautemala. Its most prominent feature is the remarkable develop- 

 ment of the calyx, which reaches proportions not known in any other species. 



The cotton of the Hopi Indians: A new species of Gossypium, F. L. 

 Lewton {Smithsn. Misc. Collect., 60 {1912), No. 6, pp. 10, pis. 5).— This publi- 

 cation gives an account of the history and a technical description of Gossypium 

 hopi n. sp. and its uses by the Pima and Hopi Indians. 



Experiments on the retting of flax, M. Ringelmann {Bui. Mens. Off. 

 Renscig. Agr. [Paris}, 11 {1912), No. 9, pp. 1115-1182; abs. in Internat. Inst. 

 Agr. [Rojyie], Bui. Bur. Agr. Intel, and Plant Diseases, S {1912), No. 12, pp. 26S8, 

 2689). — A bacteriological process is described, by means of which the retting 

 of flax may be carried on in severe winter weather with good results. 



Potassium fertilizer for hops, D. Neumann {Wchnschr. Brau., 29 (1912), 

 Nos. 48, pp. 679-682; 49, pp. 691-694).— In 12 cooperative experiments the 



