19201 FIELD CROPS. 637 



Seed potatoes treated with corrosive sublimate, formalin, and copper sulphate 

 produced average yields of 338, 331, and 248 bu. per acre, respectively, as com- 

 l)ared with 368.6 bu. from the untreated check. It was noted that yields seemed 

 to be depressed by the .seed treatment, especially in the case of copper sulphate. 



Potatoes given level cultivation yielded in 1919 365.6 bu. per acre as compared 

 with 330 bu. from ridged cultivation. The vine growth was much heavier on 

 the level cultivated plats. 



[Report of field crops work in Nebraska] (Nebraska Sta. Rpt. 1919, pp. 25, 

 27, 28). — This reports brielly on work conducted during 1919 on the North 

 Platte, ScottsblulT. and Valentine substations. 



Nebraska Hybrid No. 28, with a yield of 25.6 bu. per acre, was the highest 

 in winter wheat tests at the North Platte substation. Among spring wheat 

 varieties the durum wheats produced an average of 15.4 bu. per acre, while 

 common varieties averaged but 9.4 bu. Winter wheat gave an increase of 23 

 per cent over spring wheat. After summer tillage, winter wheat yielded 24.1 

 bu. per acre and following corn 16.7 bu. Irrigated fields produced acre yields of 

 11 tons of silage and 37.5 bu. of winter wheat, as compared with 5.1 tons and 

 23.3 bu., re.spectively, without irrigation. 



Observations on irrigated crop rotations at ScottsblufE coincided with those 

 noted previously (E. S. R., 41, p. 433). Sugar beets thinned on June 1, 10, and 

 20, produced average yields amounting to 18.8, 17.5, and 14.5 tons per acre, 

 respectively. These and previous results are held to show conclusively that 

 delayed thinning causes a marked decrease in yield. On the cultural test plats 

 oats made an average yield of 64.2 bu. per acre, and barley 59.7 bu. Trebi 

 barley has proved very satisfactory for irrigated land, doubling the yield of 

 common barley. Sweet clover continued to give good results, producing more 

 pasture per acre than any combination of grasses used. 



[Report of field crops work in Nigeria in 1917], K. T. Rae and T. Thorn- 

 ton (Ann. Rpt. Agr. Dept., North. Provs., Nigeria, 1917, pp. 8-17). — In continua- 

 tion of similar work previously noted (E. S. R., 40, p. 230), this reports the 

 results of limited variety tests with cotton, peanuts, and sorghum ; breeding 

 work with corn, peanuts, sorghum, and sweet potatoes; cultural tests with 

 tobacco ; and fertilizer experiments with sweet potatoes. 



[Report of field crops work in Nigeria, 1918], T. Thornton and V. A. 

 Ren WICK (An7i. Rpt. Agr. Dcpt., North. Provs., Nigeria, 1918, pp. 1^-23). — This 

 reports the progress of variety tests with cotton, peanuts, and sorghum ; selec- 

 tion work with corn and sorghum; cultural tests with tobacco; and fertilizer 

 tests with sweet potatoes. Results of plantings of miscellaneous cover, forage, 

 cereal, and root crops, and dye plants are also recorded. 



Cotton was not deemed a success in the Ilorin area. Experiments with 

 tobacco at this point letl to the conclusion that the color of the cured leaf was 

 closely as.sociated with the climatic conditions prevailing during the curing 

 process. .\ dark color was secured during the wet season or in a humid 

 atmosphere, while dry weather, especially when accompanied by the wind known 

 as the harmattan, produced a bright color in the cured leaf. 



Growing irrigated grain in southern Idaho, L. C. Aicher (U. S. Dept. 

 Agr., Fanncru' Ituh IKj.i {19>0), pp. 28, figs. i3).— This publication, intended 

 primarily for settlers on the irrigated lands of the Snake River Basin in southern 

 Idaho, (le.scril)es the .soils and climate of the region, and discusses field practices 

 and cultural methods that have produced the best returns from cereals grown 

 under irrigation. Information is also presented on harvesting and thrashing 

 small grain, and on the principal varieties of wheat, oats, and barley cultivated. 



