824 EXPERIMEISTT STATION RECORD. [Vol.43 



Fertilizer treatment of rork phosphate, acid phosphate, rock phosphate with 

 manure, acid phosphate with manure, and manure alone produced 5-year average 

 yields of 14^58, 146.7, 231.4, 241.38. and 230.84 bu. per acre, as compared with 

 130.12 bu. from the untreated check. The only application showing a decided 

 beneficial effect was 10 tons of stable manure. 



Limited results from studies of cultural methods with potatoes may be sum- 

 marized as follows : Immature seed yielded fully as much as mature seed. Yields 

 increased directly with the size of the seed piece, whole potatoes giving the 

 largest and quarters the smallest yields, but a higher percentage of small tubers 

 was produced where whole tubers were planted. The crop from seed grown 

 on peat land was equally as good as that from seed grown on mineral soil. 



Rutabagas have given the most satisfactory results of the various root crops 

 grown for stock feed at the station, producing an average acre yield of 24.5 tons 

 in 1918, as compared with 19.15 tons from flat turnips and 13.12 tons from 

 mangels. The American Purple Top rutabaga made a 2-year average yield of 

 27.6 tons per acre, and is recommended on account of hardiness. 



[Report of field crops work in Kentucky, 1919] {Kentucky Sta. Rpt. 

 1919, pt. 1, pp. 22-24, 25-28, Jf5). — The progress of work conducted, along the 

 .same general lines as previously noted (E. S. R.. 43, p. 331) is reported. 



Data are reported showing that the yield of corn under continuous culture was 

 not increased by the application of potash salts or of other fertilizing materials. 



Tobacco experiments included curing studies, rotations, and fertilizer tests. 

 Studies of curing Burley tobacco by artificial heat indicated that as high a 

 grade of leaf can be obtained by flue curing at a relatively low temperature as 

 by air curing, thus eliminating completely the danger of house burning. Al- 

 though fair yields and quality were secured in the 4-year rotations of tobacco, 

 wheat, clover, and orchard grass, and tobacco, wheat, clover, and corn, the 

 quality of the leaf was not equal to that from land in blue grass from 6 to 8 

 years. Fertilizer tests with tobacco, conducted on a heavy blue-grass sod 

 during the 2-year period 1917-18, included applications of nitrogen alone and in 

 combination with phosphorus, potassium, and ground limestone. The increase 

 in yield due to fertilizer was chiefly in the heavier grades, leaf and red. 



The wheat selection known as Fultz No. 1 continued to show its superiority 

 over the parent variety in yield, stiffness of straw, and other characteristics, 

 besides resisting scab better than any other variety or strain in 1919. Tests 

 of wheat varieties substantiated previous results, indicating that those grovsTi in 

 Kentucky wez'e superior to newly introduced varieties. Fultz was not sur- 

 passed by any variety tested on the station farm. 



During the first year of an experiment on the effect of soil electrification on 

 plant growth, electrified plats produced yields of 52 lbs. of green beans, 337 lbs. 

 of marketable tomatoes, 1.560 lbs. of tobacco, and 14.5 bu. of potatoes as com- 

 pared with 50 lbs., 434 lbs., 1,220 lbs., and 13 bu., respectively, on the non- 

 electrified area. 



[Field crops work in Western Australia], G. L. Sutton et al. {Dept. Agr. 

 and Indus. West Ai(St. Ann. Rpt. 1919, pp. 11-23). — Field tests of wheat, oats, 

 flax, and various grasses and fodders, and fertilizer experiments with flax on 

 the State farms are reported for the year ended June 30, 1919. 



Experiments on the influence of spring and fall grazing on the yields 

 of grasslands, R. D. Tonnesson (Norges Landbr. Hoiskoles Akerrekst. Aarsber., 

 1917-18, pp. 8-30). — The results of 21 grazing experiments conducted cooper- 

 atively in different sections of Norway from 1906 to 1918 are tabulated and 

 discussed. 



It was found that grazing generally reduces the succeeding grass cro]). 

 especially when spring grazing is practiced. The reduction in hay yield due to 



