1917] FIELD CROPS. 139 



Potatoes in California, .1. W. Gilmore (California Sta. Circ. 161 {19111), pp. 

 8). — This is a general discussion of potato production in California, including 

 cultural directions. The average cost of the preparation of the laud and the 

 growing of the crop, exclusive of harvesting, is estimated at approximately 

 $28.75 per acre. 



Potato growing in Washington, I, O. M. Morris (Wa.shiiigton Sta. Popular 

 Bill. 106 (1917), pp. 3-14). — This is a brief general discussion of potato grow- 

 ing under Washington conditions. 



Branching-headed rye grass, A. W. Green {Jour. Agr. [New Zeal.], 12 

 {1916), No. 2, pp. 122-12.'f, fig. i).— Some brief notes are given on branching 

 in tlie heads of rye grass. The author states that seldom more than 10 per 

 cent of the progeny of branched individuals possessed similar characters. The 

 plants possessing branched heads were more vigorous than normal plants. 



The botanical description of some varieties of Java and other canes, G. L. 

 Fawcett {Rev. Indus, y Agr. Tucuman, 6 {1916), No. 12, pp. 509-523, figs. 3).— 

 Several varieties of sugar cane are described, and a key devised for their 

 identification. 



Varieties of sugar cane. — The result of five years' experiments, A. H. 

 KosENFELD {Rev. Indus, y Agr. Tucuman, 6 {1915), No. 6, pp. 231-278).— This is 

 an extended report of five years of variety testing of sugar cane in Tucuman. 

 A large number of varieties were compared as regards the comparative yielding 

 ability of native and foreign varieties, the highest sugar-producing varieties, 

 the varieties most resistant to in.sects and diseases, the varieties best adapted 

 to temperature changes, and the varieties which furnish more and better fuel. 



Two Java varieties, designated as Java 36 and Java 213, and Barbados 3277 

 are recommended most highly as the result of these trials. 



The planting of sugar cane in single and double rows, W. E. Cross {Rev. 

 Indus, y Agr. Tucuman, 7 {1916), No. 4. PP- 127-132). — Some notes are given on 

 tests begun by A. H. Ro.senfeld on the planting of sugar cane in single and 

 double rows. The results obtained indicate consistently higher yields where 

 the cane was planted in double rows. 



A comparison of planting thin canes with canes of ordinary size, W. E. 

 Cross {Rev. Indus, y Agr. Tucuman, 7 {1916), No. 4, pp. 160, 161). — Brief notes 

 are given on experiments begun by A. H. Rosenfeld to compare the planting of 

 sugar cane in the usual manner with the planting of thin canes. 



The results obtained indicate that the use of thin canes slightly increased the 

 yield. An average of 28.619 kg. per hectare (12.7 tons per acre) was obtained 

 from the common method and 29,267 kg. from planting thin canes. 



Trials with thinning sugar cane in the row, W. E. Cross {Rev. Indus, y 

 Agr. Tucuman, 7 {1016), No. 4, PP- 145, 146). — This reports the continuation of 

 work begun in 1911 by A. H. Rosenfeld and J. A. Hall, and previously noted 

 (E. S. R., 31, p. 42). After five consecutive years the results show that the 

 average yield for the five-year period without thinning has been 35,440 kg. 

 per hectare (15.8 tons per acre), as compared with 31,967 kg. when the cane 

 was thinned. 



Suggestions relative to the cultivation of sugar cane in Tucuman, J. H. 

 Wale {Rev. Indus, y Agr. Tucuman, 6 {1915), No. 5, pp. 185-188) .—This is a 

 general discussion of the cultivation of sugar cane in Tucuman, with special 

 reference to planting. 



A study of the adsali cane, R. G. Padhye {Poona Agr. Col. Mag., 7 {1915), 

 No. 1, pp. 60-66, pi. 1). — Some notes are given on the production of "adsali " 

 cane, or " 18-months " cane, in India. This practice is followed to delay the har- 

 vesting of the cane until after the monsoon period. Analyses of the juice show 

 105033°— No. 2—17 4 



