830 EXPERIMENT STATION EECOBD. 



averaged 69.3 per cent; and 8 tests of hand-stripped samples averaged 73.62 

 per cent. 



Observations by the authors led to the conclusion that the seeds are best 

 when harvested in that locality from about June 15 to 20. Methods of harvest- 

 ing and curing are described with a view to getting cleaner seed and higher 

 viability. 



Testing seed corn, C. G. Williams {Mo. BvL Ohio Sta., 1 (1916), No. S, p. 

 96). — The yields of corn for the years 1911-191.5, inclusive, in an experiment at 

 the Ohio Station averaged 54.49 bu. per acre from untested seed and 58.60 bu. 

 from tested seed. It is pointed out that this increase of 4.11 bu. per acre 

 at 50 cts. per bu. represents a return of .?6.85 an hour for the time spent in 

 testing. 



The moisture content of 5 varieties of corn was determined early in November 

 in 1908, 1914, and 1915, the average being 19, 2G.6, and 33.5 per cent, respec- 

 tively. Attention is called to the high nu>isture content of the 1915 crop and 

 its relation to the percentage of germination. 



Cotton experiments, 1915, II. B. Brown (^fis.'<ifisippi f^ta. Bui. 113 (1916), 

 pp. 1-27, 29, figs. 3). — This bulletin reports in part the results of cotton ex- 

 periments conducted in 1915 at the Mississippi Station and the Holly Springs 

 and Delta substations. Results of similar experiments have been previously 

 reported (E. S. R., 32, p. 734). Temperature and rainfall records presented 

 are regarded as showing practically no relation between cotton yields and 

 rainfall and temperature fluctuations during the growing season. 



A test of 21 varieties or strains at the station indicated the general superi- 

 ority of Wanamaker-Cleveland, Cleveland Big Boll, and Ililler among the big 

 boll varieties, although on rich bottom lands under boll-weevil conditions the 

 smaller early-maturing varieties such as Trice and Dodds Prolific will possibly 

 be more satisfactory. Express is regarded as ranking as a long-staple cotton 

 for boll-weevil conditions and Unknown as comparing very favorably with 

 Express. 



Several varieties grown on silty loam land infested with cotton wilt were 

 tested as to their resistance to the disease. Simpkins and Trice, known to be 

 susceptible, were badly attacketl while Dixie and Covington-Toole, resistant 

 varieties, had practically no plants that showed external symptoms of the dis- 

 ease, and although a number of the plants were infected, their yield was not 

 affected materially. Wanamaker-Cleveland, a variety of medium resistance 

 which led in production per plant, is considered as possibly the best cotton 

 obtainable when the crop must be grown under the conditions of the experiment. 



Plats sprayed with a proprietary preparation to combat the boll weevil 

 showed a total yield of seed cotton of 1,104 lbs. per acre for April plantings 

 and 264 lbs. for June plantings, as compared with 1,176 and 2.j6 lbs., respec- 

 tively, for unsprayed plats. 



The 6-year average yield of seed cotton per acre in a test of growing plants 

 1, 2, or 3 ft. apart in the drill was in favor of the 1-ft. distance with a yield 

 of 1.643.5 lbs. The 5-year average yield of seed cotton per acre in a test of 

 different distances between the rows was in favor of 3 ft., the smallest distance, 

 with a yield of 1,446 lbs. 



The results of the variety tests at Holly Springs, which are given in a table, 

 indicated that Wanamaker-Cleveland, Cleveland Big Boll, Miller, and Triumph 

 are among the leading varieties for the hill section of the State. Results of a 

 variety test at Delta branch station are tabulated but no conclusions with 

 reference to individual varieties are drawn. The variety averages for the 

 three stations and tlie rank of varieties grown the last five years on the basis 

 of money value per acre are also presented in tables. 



