19161 HORTICULTI'RE. 839 



The history of the Viticultural Station of Lausanne, 1880-1916. H. Fais 

 and F. PoRCHET (La Station Viticole Cantonale Vauduuie de Lausanne di$ Sa 

 Fondation d Son Transfrrt <) la Coiif^dr'-ratiott Suisse, tHS6~l'JI6. Lauxanne: 

 Dept. Vaud. Agr., 1916, pp. 107, pis. 2, figs. 72).— This comprises a retrosiwctive 

 study of the Viticultural Station of Lausanne with reference to its <)r;;»iiiza- 

 tion, investigations, publications, and participation In the development and 

 protection of tlie Swiss vineyard industry. 



Vitic\ilture in South Africa, A. I. Perold (Intcmat. Inst. Agr. [Rome], 

 Intemat. Rev. Set. and Pract. Agr., 7 (1916), No. 1, pp. ISO).— A descriptive 

 account in which the author discusses the history of viticulture in South 

 Africa, the distribution of vineyards, climatic and soil conditions, culture, 

 vine diseases and insect pests, methods of fertilization, utilization of American 

 stoclis and self-bearers, grafting and nursery work, elTects of grafting on the 

 quantity and the quality of the grapes and wine, varieties, methods of wine 

 making, viticultural products, the labor question, government aid for pro- 

 moting the industry, and statistics. 



Investigation on the nitrogen nutrition of the olive, L. Petri (Atti R. 

 Accad. Econ. Agr. Oeorg. Firenze, 5. ser., IS {1916), No. S, pp. 138-147).— The 

 author finds that the nitrogen content of flowering branches on which the 

 flowers were fertile averaged from 2.119 to 2.37 per cent of the dry weight, 

 whereas in flowering branches in which the ovaries were abortive the nitro- 

 gen content was only 0.72 to 0.924 per cent of the dry weight. The investiga- 

 tion also shows that where there is only a limited quantity of nitrates in a 

 soil poor in organic matter, there is a large development of mycorrhlza. 

 Where nitrates occur in abundance the rapid growth of the rootlets furnish 

 an important check to the infection of mycorrhlza. 



The investigation as a whole suggests that nitrogen should be applied to 

 olive trees in a readily available form, both on account of its effect in pro- 

 ducing fertile fruit buds and in view of its influence in checking mycorrhlza. 

 If nitrogen is furnished in less available forms the rootlets gi-ow less rapidly and 

 permit of the invasion of fungus growth. 



Citrus experimental grove, S. E. Collison {Florida Sta. Rpt. 1915, pp. 

 XCIX-CI). — In continuation of previous reports (E. S. R., 33, p. 48), measure- 

 ments are given showing the average gain in diameter of trees from June, 

 1909, to June, 1915, growing on various fertilizer plats in the citrus experi- 

 mental grove. The data are accompanied by notes on the condition and treat- 

 ment of the grove. 



Report of plant physiologist, B. F. Floyd {Florida Sta. Rpt. 1915, pp. 

 XXXII-XLVIII). — Experiments to determine the influence of certain sources 

 of ammonia and phosphoric acid upon the growth of grapefruit seedlings grown 

 in sand and in field soil were continued (E. S. R., 33. p. 48). The results from 

 the sand culture experiments described in 1914 are compared with those secured 

 in 1913 and the following conclusions are deduced : 



Dried blood is superior to the other sources of ammonia used for producing 

 vegetative growth. When used in combination with dried blood, phosphoric 

 acid from different sources varies the amount of growth but little. In combina- 

 tion with ammonia from mineral sources, however, phosphoric acid from differ- 

 ent sources causes a large difference in amount of growth. Basic slag gave 

 the best results as a source of phosphoric acid when used in combination with 

 ammonia from mineral sources. The acid combination (sulphate of ammonia- 

 acid phosphate— high grade sulphate of potash), produced the smallest amount 

 of growth of any of the combinations, but the amount of growth from this com- 

 bination was largely increased when lime was added. The amount of growth 

 69107°— No. 9—17 4 



