1919] FIELD CROPS. 333 



New crops for Rhodesia, J. A. T. Wai.tkhs (Rhodesia Agr. Jour., 1 ', [1917), 

 Noa. S, pp. 327-331. pis. 4; 6, pp. 737-743).— The author presents a brief report 

 on sonic of the most recent crop Introductions deemed of value to Rhodi sian 

 agriculture, as Indicated by tests conducted at the Salisbury agricultural ex- 

 periment station during 191G-17. The crops discussed Include grasses and 

 legumes for pasture, cereals, oil seeds, root crops, fiber plants, corn, and m 

 cellaneous forage crops. 



Oleaginous plants of Indo-China, C. Crevost (liul. icon, Indochine, n. 

 20 (1911), No. 127, pp. 563-619, ph. 18).— A comprehensive account. Including 

 brief botanical descriptions and cultural notes, of numerous oll-producl 

 plants in Indo-China. 



Cotton and other vegetable fibers: Their production and utilization, E. 

 GoLT.ni.Nc, (London: John Murray, 1917, pp. X-\-231, pis. 1 .' ; rev. in Set. Prog. 

 [London], 12 (1918), No. 48, pp. 694, 695).— This volume, with a p by 



W. R. Dunstan, issued in the Imperial Institute series of handbooks to the 

 commercial resources of the Tropics, deals with the present status and the 

 luture prospects of the world's production and utilization of fibers, Includl 

 cotton, fiax, hemp, ramie, jute, and cordage and miscellaneous fibers. Par- 

 ticular reference is given to the possibilities of extending production in the 

 British Empire, especially in the tropical possessions. 



Wheat and rye, C. A. Zavitz (Ontario Dept. Agr. Bui. 261 (1918), pp. 31, 

 figs. 4). — This reports the results of variety and cultural tests with winter and 

 spring wheat, winter and spring rye, emmer, and spelt conducted at the Ontario 

 Agricultural College. 



In variety tests with winter wheat covering a 22-year period, Dawson Golden 

 Chaff and Imperial Amber have given the highest average yields, 50.2 and 47.2 

 bu. per acre, respectively. A hybrid, O. A. C. No. 104, obtained by crossing 

 Dawson Golden Chaff and Bulgarian, has produced an average yield of 45 bu. 

 per acre for a 6-year period, as compared with yields of 40.8 bu. for Dawson 

 Golden Chaff and 37.5 bu. for Bulgarian for the same period. 



In tests of various methods of soil preparation for wheat the maximum yield 

 was obtained after bare summer fallow receiving 20 tons of barnyard manure 

 per acre, the average being 40.9 bu. for a 4-year period, as compared with an 

 average of 33.8 bu. after summer fallow alone. Wheat after field peas, buck- 

 wheat, and Dwarf Essex rape plowed under showed yields of 36.1, 29.0, and 

 bu. per acre, respectively. 



Date-of-seeding tests covering a 6-year period resulted in average yields rang- 

 ing from 4S.6 to 49.7 bu. per acre for seedings made from August 25 to Septem- 

 ber 9, as compared with 45.7 bu. for seedings made after September 15. Pour, 

 6, and 8 pk. rates of seeding showed average yields for a 0-year period of 10.15, 

 43.3, and 43.87 bu. per acre, respectively. 



Experiments were begun in 1S97 to study the effect of harvesting winter 

 wheat at different stages of maturity, the cuttings being made at weekly inter- 

 vals for 5 weeks, beginning 2 weeks before the usual time for cutting wheat 

 throughout the Province. Seed from the different cuttings were secured and 

 sown again in the fall, this process being repeated annually for 20 years and 

 the yields of grain and straw being recorded. The average yield of grain varied 

 from 21.1 bu. per acre for the first cutting to 51.17 bu. for the fourth, and 19.64 

 bu. for the fifth cutting. The yields of straw showed a gradual decrease as the 

 date of harvest advanced, ranging from 3.49 tons per acre for the first cutting 

 to 2.79 tons for the fifth. The weight of grain per measured bushel Increased 

 from 45.19 lbs. for the first cutting to 59.77 lbs. for the fourth, and 58.79 lbs. 

 for the fifth. 



