634 EXPERIMENT STATION RECORD. [Vol.88 



Winter irrigations of 10 and 5 in. on potato plats receiving level, ridge, and 

 Greeley cultivation resulted in an average germination of 93 and 87 plants per 

 plat, respectively, as compared with 54 plants for plats receiving no winter irri- 

 gation. Winter and summer irrigated Greeley and level culture plats are de- 

 scribed as giving satisfactory yields, while the nonirrigated winter or summer 

 plats were very poor. The effect upon yield of potatoes of different methods of 

 irrigation and cultivation and of manure are depicted graphically. 



Corn receiving manure has produced an average yield of 46.6 bu. per acre 

 for the two years 1915 and 1916, as compared with a yield of only 17.3 bu. for 

 unmanured. Corn grown in plats irrigated before seeding produced a S-year 

 average yield for three different varieties of 37.3 bu. per acre and an average 

 stand of 53 per cent, as compared with a yield of 41.2 bu. and a stand of 89.3 per 

 cent for the same varieties grown on plats irrigated after seeding. 



Tests of methods of Johnson grass eradication, of Sudan grass and Russian 

 thistle suitability for forage, and of varieties of sugar beets and alfalfa are 

 briefly noted. 



In cotton variety tests, the three best varieties were Burnett with 1.47 bales 

 of lint cotton per acre, Durango with 1.46 bales, and Allan Improved Triumph 

 with 1.37 bales. 



[Field crops work at the Canada stations and farms in 1915], J. H. Gris- 

 DALE ET AL. {Canada Expt. Farms Rpts. 1916, pp. lOS-115, 192-382, 643-647, 

 701, 702, 704, 705, 721, 722, 733-736, 765-769, 782, 783, 788, 789, 810-813, 817- 

 822, 847-849, 861, 862, 872, 873, 880, 881, 902, 903, 911, 915, 916, 920-926, 952- 

 954, 985, 994, 999-1093, 1129-1134, 1195-1300, 1381-1427, pis. 14).— A detailed 

 report of variety, fertilizer, and cultural tests with cereal and forage crops, 

 sugar beets, flax, hemp, potatoes, and tobacco in a continuation of similar 

 work previously noted (B. S. R., 36, p. 32). The results obtained are presented 

 in tabular form and briefly discussed. 



Variety and cultural tests with winter and spring wheat, oats, barley, field 

 peas, flax for grain and fiber, winter and .spring rye, emmer, spelt, buckwheat, 

 vetch, corn for silage, root crops for forage, clover, alfalfa, and miscellaneous 

 legumes and grasses for hay were conducted at the stations, substations, and 

 farms in the Provinces of Ontario, Prince Edward Island, Nova Scotia, New 

 Brunsviack, Quebec, Manitoba, Saskatchewan, Alberta, and British Columbia. 

 Rotation and fertilizer tests have been conducted in the same localities, and 

 a rather extensve study made of the cost of production of various field crops. 

 Date-oi-planting tests and tests of different sized seed pieces have been made 

 with potatoes, in addition to variety tests. Analyses of standard varieties of 

 sugar beets grown at various centers are also presented. 



Variety, cultural, and fertilizer tests with tobacco, and observations on seed- 

 bed majiagement and on harvesting and curing the crop conducted in the 

 Provinces of Ontario and Quebec, are described as heretofore. Additional work 

 dealing with a survey of tobacco soils in Canada, and the study of tobacco 

 diseases and of selection and plant breeding work is outlined. The season of 

 1915 is described as having been absolutely adverse to tobacco growing, 

 although a large increase in the production of bright tobacco in Ontario is re- 

 ported, due to a more judicious selection of the soils. In fertilizer tests con- 

 ducted at Farnham (Quebec) the yield with superphosphate was 1,583 lbs. of 

 tobacco per arpent (0.84 acre), as compared with a yield of 1,481 lbs. from 

 basic slag. A fertilizer formula including 250 lbs. of sulphate of ammonia, 150 

 lbs. of sulphate of potash, and 120 lbs. of superphosphate per arpent is recom- 

 mended. 



Tests in seed-bed management at Harrow (Ontario) indicated that the best 

 results were obtained where fertilizers were applied before steaming the soil. 



