No. 1, July, 1920] IIORTICULTUKK 14-'i 



914. CROCKER, WILLI AM. Conditions affecting flower development. [Rev. of : (1) l.i 

 George. Ueber die Bliitenbildung von Sempervivum. (Blossom formation in Sempervivum.) 

 Festschrift sum Emat 8tahl 128 161. Jena, 1918. (2) Fischer, ii. Zur Frage der Koh- 

 lensaure-Ernahrung der Pflanzen. (Concerning the carbon-dioxide assimilation of the plaj 

 Gartenflora 65:232-237. L916. (3) Ku.\rs, E. J., and H. R. Kraybill. Vegetation and 

 reproduction with special reference to the tomato. Oregon Agric. Exp. 8ta. Bull. 1 !'.». 90 p. 

 1918.] Bot. Gas. 67:445 l 16. May, 1919.— See Bot. Absts. 4, Entry 1563. 



915. Chuicksh ank, Robert B. Orchard fertilization. Trans. Indiana Hortic. Soc. 

 1918: 121-137. 1 pi., 3 fig. 1919. — A discussion is given on the results of experiments on the 

 fertilization of the poorer orchard soils of southern Ohio. Nitrogen in the form of nitrate of 

 soda has shown itself to be the necessary element in the great increase in production and 

 improvement in vigor of the hill orchards of southern Ohio. Potash has been of no value in 

 Ohio as an orchard fertilizer. Phosphorus in the form of acid phosphate, even when used 

 with nitrate of soda, has had no effect either in increased production or in growth of tree. 

 However, it has been valuable as a means of obtaining and maintaining clover in the orchard 

 and in this way has increased the organic matter of the soil. For thin soils such as those 

 worked with in southern Ohio, the author recommends a 5 to 5 combination, 5 pounds each 

 of nitrate of soda and acid phosphate to the tree. The nitrate of soda will promote growth of 

 the tree and production of fruit and will aid in the growth of the grasses. The acid phosphate, 

 while not benefiting the tree, will aid in the growth of the clover. The best results from 

 nitrate of soda were obtained when the material was applied just about the time the blossoms 

 were showing pink. — F. P. Cullinan. 



916. Cruickshaxk, R. B. War time orcharding. Trans. Indiana Hortic. Soc. 1918: 

 4S-6S. 1919. — A discussion of orchard operation with suggestions for economy of time and 

 labor during the war period. — F. P. Cullinan. 



917. Davis, R. A. Fruit and fruit products of South Africa, I. — Deciduous fruit. South 

 African Jour. Indust. 2 : 774-783. 1919. 



918. Davis, R. A. Fruit and fruit products of South Africa, II. — Citrus and other non- 

 deciduous fruits, berries and nuts. South African Jour. Indust. 2: 853-866. 1919. 



919. de Castella, F. Repruning of vines damaged by frost. Jour. Dept. Agric. Victoria 

 17:606-614. 8 fig. 1919. 



920. Esbjerg, Niels. Forsog med sorter of stikkelsbaer og Solbaer. [Experiments with 

 varieties of gooseberries, currants and black currants.] Tidsskr. Landbrug. Planteavl 26: 

 52-79. 1919. — The variety experiments were started in 1909 at the Spangsbjerg Station, 

 Esbjerg, Denmark. Eight plants of each variety were planted in 5 plots and picking com- 

 menced in 1911, data until 1917 being presented. Fields were recorded as follows in hekto- 

 kilogrammes per hectare. — Red-berried gooseberry varieties, picked ripe: Achilles 1237; 

 Sproffens Goliath 1119; London Market 982; Whinhams Industry 724; Crown Bob 675; Non 

 Plus Ultra 492; Victoria 315: Williams 300. — Green-berried gooseberry varieties, picked ripe 

 1911-14, unripe 1915-17 (shown parenthetically)— Whitesmith 414 (741); Keepsake 317 (649); 

 Gottlieb 214 (595) ; Green Willow 248 (528) ; Brougham 133 (447) ; Profit 249 (365) ; Favorite 

 133 (240). Currant varieties— Red Dutch 433; Fay's New Red Prolific 212; Cherry Dutch 

 187; la Fertile 105. Black currant varieties — Black Naples 313; Bang-up 396; Queen Victoria 

 275; Ogden's Grape 217.— Albert A. Hansen. 



921. Fairchild, David. The palate of civilized man and its influence on agriculture. 

 Sci. Amer. Supplem. 87:6S-71. 8 fig. 1919. 



* 922. Folger, J. C. The commercial apple industry in the United States. U. S. Dept. 

 Agric. Yearbook 1918:367-379. PI. 2, 3 fig. 1919. — Apple production is increasing in im- 

 portance. Apples rank ninth in farm crops. Farm orchards are sharply distinguished from 



