FIELD CKOPS. 339 



No. 33, pp. 495, 496). — Text of a paper read by Professor Albuquerque before the 

 West Indian Sugar Conference, held at Barbados, on the practicability of increasing 

 the sugar content of cane by planting seed selected from canes which are shown by 

 chemical analysis to be especially rich in sugar. 



Sug-ar cane culture in Ecuador [Mitt. Deut. Lnndw. GeselL, 15 {1900), Sup. to 

 No. 26, PI). 209-215). — Cultural methods, methods and cost of manufacture, exports, 

 and the possibilities of the sugar industry in Ecuador are considered in detail. 



Tobacco (»Sb'. Amcr. Sap., 49 [1900), No. 1268, pp. 20332, 20333) .—^oma general 

 notes on the culture and manufacture of tobacco in this and foreign countries. 



Tobacco {Bui. Bot. Dept. Trinidad {1900), No. 24, pp. 252, ^5.5).— Tobacco in 

 Trinidad gives the best results when seeded in September, planted out in November, 

 harvested in February, and dried and cured by the methods followed in Cuba a 

 month later. A crop in 1899-1900 yielded at the rate of 800 lbs. of tobacco per acre, 

 estimated to be worth 12 cts. per pound. The largest item of expense was in piciking 

 the worms night and morning. 



Field fertilizer experiments on tobacco, W. Frear {PenriMjlvanui Sta. Bui. 49, 

 pp. 1-8). — The data here recorded have been abstracted froni another source (E. S. 

 R., 11, p. 924). 



Comparative analyses of tobacco, J. C. BRtJNNicn {Queensland Agr. Jour., 7 

 {1900), No. 2, pp. 162, 163). — Complete analyses as regards acids, gums, alkaloids, 

 oil, starch, resins, albuminoids, pectose bodies, and ash constituents are given in 

 parallel columns of Virginia and Queensland raw leaf tobacco. 



Results obtained from the cross-fertilizing of cereals, W. Saunders {Prnc. 

 Soc. Prom. Agr. Sci. 1899, pp. 74-81). Changes in the composition of wheat effected 

 by climate, soil, etc., are mentioned. Some Russian, Indian, and other varieties of 

 wheat used in crossing are noted, and descriptions given of 5 crossbred wheats orig- 

 inated by the author and 2 hybrid barleys. 



Report on experiments carried out at the experimental plats at Drakes- 

 brook, (i. Bertiioud {Jour. Dept. Agr. West. Au.9traUa, 1900, i[(ui, jip. 56-76). — Xotes 

 on the manuring and growth of a number of varieties of wheat on new lands, old 

 lowlands, and on highlands; and on fertilizer and variety tests with potatoes. 



Wheat manuring experiments in Victoria, A. N. Pearson {Jour. Agr. and Ind. 

 South ^iusfrulia, S {1900), No. 8, pp. 653-655). — The average results are given of growing 

 wheat with concentrated superphosphates alone and combined with nitrate of soda. 

 In one experiment Thomas slag was used, and in another, sulphate of ammonia. 

 The experiments were carried out in 5 different localities under very unfavorable 

 weather conditions. The increased yields obtained due to the fertilizers varied from 

 1 to 5.33 bu. per acre. The use of 10 lbs. of concentrated superphosphate per acre 

 was scarce sufficient, while the use of 30 lbs. generally proved sui^erabundant. The 

 medium dressing of 20 lbs. gave the best average results. The use of nitrogen seemed 

 to decrease the effect of the superphosphate. 



Thick and thin seedings, L. Grandeau {Jour. Agr. Prat., 1900, II, No. 33, pp. 

 221, 222). — Experiments carried out at Princes Park in seeding wheat and oats at 

 different rates are reported. Wheat was drilled at rates of 90, 156, and 194 kg. per 

 hectare, and oats at rates of 36, 105, and 162 kg. per hectare. With both crops the 

 yields increased as the quantity of seed sown increased. In a test of sowing similar 

 amounts of seed broadcast and in drills, seeding in drills gave largely increased yields 

 over the broadcasted plats with both oats and wheat. 



Deep-rooted plants as related to the health of crops, J. Klocker {Deut. 

 Landu\ Presse, 27 {1900), No. 49, pp. 631, 632). — A compiled article showing the 

 greatly increased length and development of potato roots when preceded by a crop of 

 long-rooted lupines, and the consequent increase in growth of vines, freedom of the 

 vines from disease, and yield of tubers. These results were especially noticeable in 

 dry years, and are thought to be due to the greater supply of water brought within 



