744 EXPERIMENT STATION RECORD. [Vol.43 



supply is available and fertilizers containing high niti-ate contents are added at 

 the time or prior to the date of seeding of the cover crop. The use of fertilizers 

 in run-down prune orchards has shown nitrate fertilizers to be the only ones that 

 have made any distinct improvement in the orchards studied. 



In apple storage tests conducted in the winter of 1918-19 the fruit produced in 

 the warmer parts of valleys went down in storage befcn'e the material of the 

 si\n\£ valley secured from the cooler and more elevated sections. 



Some orchard problems, C. A. McCue (Trans. Peninsula Hort. Soc. [Del.], 

 !) {1920), No. 3, PI). Jfii-51). — A contribution from the Delaware Agricultural 

 College, comprising recommendations relative to orchard fertilization and out- 

 lining a test fertilizer expei'iment to be used by the grower in seeking to deter- 

 mine the fertilizer needs of his orchard. 



Results of pollination studies at Idaho University, C. C. A^incent (Better 

 Fruit, l.'i (1020), No. 8, i)p. 11-13. 15, fifjs. 3).— Data are given on pollination 

 studies conducted with a large number of varieties of apples for several yeara. 

 Results in general indicate that, although a few varieties were self-fertile, most 

 varieties are from a practical standpoint self-sterile and should be interplanted 

 with suitable pollenizing varieties. 



Thirty years' experience in application of bud selection in the fruit in- 

 dustry, G. T. Powell (Calif. Citrogr., 5 (1920), No. 11, pp. 3U, 36.i-366, figs. 

 Jf). — A paper read before the California nurserymen at San Francisco, in which 

 the author briefly reviews his experiences in the propagation of apples from 

 selected buds. 



Life histories of some well-known apples, C. H. Hooper (Fruit, Flower, 

 and Teg. Trades' Jour. [London'], 38 (1920), No. 2, pp. 35-31). — A compilation 

 of information relative to the origin, value of the fruit, fruiting period, and 

 sterility or fertility of a large number of apples grown in Great Britain. 



Varieties of apples adapted for Ohio culture, W. J. G^.^:EN, P. Thayer, and 

 J. B. Keil (Mo. Bui. Ohio Sta., 5 (1920), No. 6, pp. 180-186).— This comprises 

 excerpts from Bulletin 290 of the station (E. S. II., 35, p. 40). It discusses in 

 particular the adaptability of the Baldwin, Ben Davis, and Northern Spy 

 varieties to Ohio conditions. 



Experimental results in pruning apple trees, E. C. Auchter (Rpt. Md. 

 Agr. Soc., 4 (1919), pp. 116-128; also in Trans. Peninsula Hort. Soc. [Del.], 

 9 (1920), No. 3, pp. 23-30). — A contribution from the Maryland Agricultural 

 College. The author summarizes pruning experiments previously conducted at 

 the West Virginia Station (E. S. R., 36, p. 535), and briefly discusses the appli- 

 cation of the results to Maryland conditions. 



Notes on the origin of some of our cherries, C. H. Hooper (Fruit, Flower, 

 and Veg. Trades' Jour. [London], 38 (1920), No. 3, pp. 63, 6^). — A compilation 

 of information relative to the origin, blossoming, and harvest periods, sterility 

 or fertility of the blossoms, and distinguishing characteristics of a large number 

 of cherries grown in Great Britain, including also notes on a few American 

 varieties. 



The histories of the plums we grow, C. H. Hooper (Fruit, Floicer, and Veg. 

 Trades' Jour. [London], 37 (1920), No. 24, pp. 6^7, 648). — This comprises com- 

 piled information relative to the origin and sterility or fertility of varieties of 

 plums grown in England. 



Prune growing in western Washington, O. M. Morris (WasJiington Sta. 

 Pop. Bui. 120 (1920), p. 21, figs. 7). — Practical suggestions are given on prune 

 growing, the information being gained by a survey and also through cooperative 

 experimental work, including fertilizer tests. Consideration is given to varie- 

 ties, pruning, cultivation, fertilizers, and the cause of crop failures. 



