534 EXPERIMENT STATION RECORD. [Vol.35 



Influence of time of topping upon distance between leaves on the stalk, 

 H. R. Kraybill (Pennsylvania Sta. Rpt. 19 1^, pp. 375-377). — Observations 

 were made in 1913 upon 64 plants of the Slaughter strain of Pennsylvania 

 Broadleaf similar in size, uniformity, and vigor. Sixteen plants were topped 

 as soon as the first bud was visible, 16 at the stage of development half-way 

 between the time when the first bud had appeared and the time when the first 

 blossom appeared, 16 when the first flower appeared, and 16 were allowed to 

 mature seed. All topped plants were topped to 15 good leaves. 



The data presented in tables indicate that the stem continues to elongate even 

 after the first flower appears but that the portion bearing the eighth to the 

 fifteenth leaf makes the greater increase in length. Prom the time the first bud 

 appeared both portions of the stem seemed to elongate, the portion bearing the 

 first to the eighth leaf making the slightly larger increase. Topping appeared 

 to arrest growth, affecting to the greatest extent the portion bearing the eighth 

 to the fifteenth leaf. A distinct increase in the length of the internodes was 

 observed after the time the first bud appeared, the average increase between 

 neighboring leaves of the first to the eighth leaf being 0.183 in. or 20.8 per cent, 

 and of the eighth to the fifteenth leaf 0.13 in. or 10.4 per cent. 



White Burley tobacco, I. S. Cook and C. H. Scherffius (West Virginia Sta. 

 Bui. 152 {1916), pp. 3-20, figs. 6). — Cultural directions, including soil selection 

 and preparation, rotations, transplanting, cultivation, topping, selection of 

 seed plants, harvesting, curing, stripping, and grading are given, and the re- 

 sults of variety and fertilizer tests are reported. The work is in cooperation 

 with the U. S. Department of Agriculture. 



Introduced varieties of White Curley grown from selected seed gave promise 

 of proving superior to the standard variety grown in the State. The results 

 of several fertilizer tests indicated that nitrogen influences the yields of tobacco 

 in the State more than does either potash or phosphoric acid. A combination 

 of all three plant food constituents produced the highest average yield, and 

 an application of about 700 lbs. of a high-grade fertilizer containing not less 

 than 4 per cent of nitrogen was found profitable. In one test conducted for 

 two years the use of 10 tons of barnyard manure per acre gave the best results 

 of all fertilizer materials applied. The approximate cost of growing an acre of 

 tobacco, including the use of 1 ton of ground limestone, 200 lbs. each of sodium 

 nitrate and potassium sulphate, and 300 lbs. of acid phosphate was determined 

 as itemized at $66.50. 



Tobacco growing- in Canada, F. Chaelan (Canada Dept. Agr. Bui. 25, 2. 

 ser., pp. 29, figs. S).^This bulletin discusses in a popular manner the different 

 phases of tobacco culture, such as the selection and preparation of the soil, 

 the use of hotbeds, cultural methods, harvesting, curing, fermentation, and 

 marketing. 



Wheat experiments, C. G. Williams (Ohio Sta. Bid. 298 (1916). pp. W- 

 484, figs. 19). — This bulletin reports the results of experiments with wheat 

 covering the period from 1887 to 1915, most of the work having been done the 

 last 15 years. The experiments included soil treatment, methods of seeding, 

 tests of varieties, variety improvement by means of pure line selection, and 

 milling and baking tests. Most of the work was done on the station farm at 

 Wooster, but results secured at Columbus, at the district experiment farms at 

 Strongsville, Germantown, Carpenter, and Findlay, and at the county experiment 

 farms in Paulding, Miami, Hamilton, and Clermont counties are also reported. 



Wheat without fertilizer treatment in a 5-year rotation with corn, oats, clover, 

 and timothy averaged 42 per cent higher in yield, and in a 3-year rotation with 

 corn and potatoes 50 per cent higher than wheat receiving no fertilizers in 



