832 EXPERIMENT STATION RECORD. [Vol.35 



darker green, prolonged the growing period, increased the yield, and materially 

 checked the ravages of late blight caused by the fungus Phytophthora infestans, 

 while lime-sulphur aggravated tipburn, dwarfed the plants, shortened the grow- 

 ing period, reduced the yield, and proved valueless as a preventive of the disease. 

 The average results for the five years show an increase of 68.8 bu. of market- 

 able tubers per acre ascribed to spraying with Bordeaux mixture as compared 

 with a decrease in yield of 2.5.8 bu. ascribed to spraying with lime-sulphur 

 solution. 



Culture of rye in the eastern half of the United States, C. E. Leighty 

 (17. iS. Dept. Agr., Farmers' Bui. 156 {1916), pp. 16, figs. 8).— This describes 

 varieties of rye adapted to the cotton belt and the Northern States in the 

 eastern section of the country, and discusses the production of the crop. The 

 following varieties are reported as having given an excess of 30 bu. per acre 

 for the three or four years that they were grown at Arlington Farm, Va. : 

 Giant Winter, Abruzzes, Arlington Winter, Virginia Winter, Mexican, Rimpau, 

 Ivanof, and Henry. In the discussion of the producing of the crop the soils 

 adapted to rye, the place of rye in the rotation, the preparation of the seed 

 bed, the use of fertilizers, preparation of the seed, time, method, and rate of 

 seeding, and the methods of harvesting are noted. The pests affecting the 

 crop and their control are also briefly mentioned. 



New sorghum varieties for the central and southern Great Plains. H. N. 

 ViNALL and R. W. Edwards (U. S. Dept. Agr. Bui. 383 (1916), pp. 15, figs. 7).— 

 A description is given of Dwarf hegari. Improved feterita. Dwarf feterita, 

 W^hite milo maize, and Schrock Kafir corn, and a comparison is shown in a 

 table of the field records of these sorghums at Chillicothe and Amarillo, Tex., 

 from 1913 to 1915, inclusive, and at Hays, Kans., for the years 1914 and 1915. 

 The three-year period included a wet year, a dry year, and one of average 

 weather conditions. The value of the varieties in different portions of the 

 Great Plains is discussed and general conclusions are drawn. 



It is pointed out that Schrock Kafir corn has a long growing season and 

 therefore yields best in the southern portion of the Great Plains. While pro- 

 ducing good yields under favorable conditions it does not furnish at the same 

 time a good quality of grain, as its seeds contain an appreciable amount of 

 tannin. Dwarf hegari is recommended for the whole sorghum region in 

 Texas lying south and east of the Panhandle. Dwarf feterita and Improved 

 feterita gave better results than ordinary feterita and are regarded as generally 

 promising a larger grain yield than either Dwarf milo maize or Dwarf Kafir 

 corn on the high plains of northwestern Texas, western Kansas, and eastern 

 Ck)lorado. White milo maize produced very satisfactory yields of grain and 

 while the fodder furnished is rather inferior in quality, it is considered worthy 

 of more extensive planting in northwestern Texas, western Oklahoma, western 

 Kansas, eastern Colorado, and western Nebraska. 



A study of Colorado wheat, II, W. P. Hbiadden (Colorado Sta. Bui. 217 

 (1916), pp. 3-46). — The work here reported, conducted in 1915, is in continua- 

 tion of investigations carried on in 1913 and described in Bulletin 208 of the 

 station, already noted (E. S. R., 33. p. 637). A study of the composition of the 

 wheat plant and the effects of fertilizers are presented, together with a general 

 statement of the weather conditions for the two seasons. No further study of 

 the bacteriology of the soil reported in the bulletin mentioned was made. A 

 summary of the results, including the data collected in 1913, is given. 



The land used for these experiments, as determined in 1913, contained a liberal 

 supply of total potash, 101.6 tons in the upper 2 ft. of soil, with approximately 

 1 ton available at that time. The quantity of hydrochloric acid-soluble potash 

 indicated over 25 tons available. The citric acid-soluble phosphoric acid was 



