444 EXPERIMENT STATION RECORD. [Vol.40 



HORTICULTURE. 



[Report of horticultural investigations], O. B. Whipple (Montana Sta. Rpt. 

 1917, pp. 252, 253, 254, 255). — A brief statement of progress made in variety and 

 cultural tests of vegetables and fruits. 



A continuation of studies of premature seeding in celery again clearly dem- 

 onstrated that moving plants to the cold frame early was the most important 

 factor in favoring premature seeding (E. S. R., 38, p. 344). Plants subjected to 

 the cool temperature of the cold frame produced 50 per cent of seed stalks, 

 while check plats produced none. In the selection work with tomatoes the great 

 majority of the station's selections of ESarllana and Chalk Early Jewel out- 

 yielded seed purchased from well-known seed houses. 



Some data were secured during the year on the influence of the position of 

 the fruit in the cluster upon the form of Mcintosh and Wealthy apples. Iu 

 general, the length of the apple Increases from the outside of the cluster to the 

 center and the length of stem Increases from the center outward. In the case 

 of the Mcintosh, the best fruits were Becured from the fourth and fifth blossoms, 

 counting from the outside of the cluster. The renter blossom in clusters of six 

 flowers produced an Inferior-shaped fruit 



[Horticultural investigations at the Umatilla experiment farm, Oreg., in 

 1917], It. W. Ann n 1 1 . 8. i>< id. Ayr., Bur. Plant Indus.. Work- Umatilla Bxpt. 

 Farm, 1911, pp. 9-12, .. '-27). — This Is a progress report OS the apple-orchard 

 cover-crop and the peach-orchard experiments being conducted al the farm 

 (E. S. R., 38, p. 443), together with notes on variety tests of orchard fruits, 

 grapes, and ornamental and windbreak plants. Tabular data are given show- 

 ing the yield of fruil In 1917, and the Bia a of the trees in 1915 and HUT on the 

 various plats In the apple and peach orchard experiments, and also the growth 

 record of peach varieties on the farm In 1915 and put. 



[Horticultural investigations on the Yuma reclamation project in 1917], 

 R. E. Rlaik (U. 8. Dept. I.y.. Unr. Plant Indus., Work Yuma Empt. Farm, 

 1917, pp. 35-44, flff*- 7). — The usual progress report on cultural and variety tests 

 of orchard and small fruits and vegetables (E. s. EL, 89, p. 444). 



The garden: How to make it pay. 11. 11. Thomas {London and Xcic York: 

 Cassell d Co., Ltd., 1918, pp. VI 1 1 + 151, Jiys. 7.}). — A popular treatise on vege- 

 table, fruit, and flower gardening, Including a monthly working calendar. 



A new method of using explosives in tree planting. — Its advantages and 

 utilization in the rapid reconstitution of orchards devastated by the enemy, 

 A. PitDAi.i.u {Oompt. Rend, Acad. Soi. [Pari*}, 167 {1918), No. 21, pp. 763, 

 764). — The author calls attention to the Vigorous development of wild plauts 

 growing on the bonier of she'd holes and abandoned trenches, as well as to 

 certain beneficial results which have followed the use of explosives in tree 

 planting In the United States. He then advocates the use of a combined 

 fertilizer and explosive shell in replanting the devastated regions of Prance, with 

 a view to distributing the essential fertilizers through the subsoil broken up 

 by the explosives. 



Progress report on rootstock experiment, W. L. Howard (Mo. BuL Cal. Coin. 

 Hort., 8 (1919), No. 1, pp. IS, 14, fig. J).— Tests of different rootstocks for de- 

 ciduous fruit trees were started at the University Farm at Davis, CaL, in the 

 spring of l!)l. r >. The present paper briefly reviews all varieties and stocks of 

 different ages from one to four years. 



The results thus far secured Indicate that the quince stock is not congenial 

 for the Bartlett pear, which variety has done best on French pear and bas also 

 done well on Japanese stock for two seasons. There Is essentially no differ 



