10101 FIELD CROPS. 37 



bee! crop during ioifi and 1017 by means '>f analyses made :it nine factories, 

 although the variety tests bad to be discontinued. The average weekly results 

 obtained from these two sots of analyses are presented In tabular form, showing 

 the weight of roots lifted, the percentage of sucrose, amount of sugar in roots 

 lifted, and sugar produced per hectare and per root per week. 



It is concluded that the beet crop was practically as rich in sugar in 1916 

 and 1917 as for the 10 years preceding the war. For the 10-year period a 

 maximum production of sugar of 669 kg. per hectare and 7.95 gm. per root 

 was obtained the first week in September, while In 1016 and 1017 the maximum 

 production was reached about the third week in September and amounted to 

 653 kg. per hectare and 9.92 gm. per root. 



[A study of the relative value of seed cane from different sources], F. Lede- 

 BOEB and .7. W. van Dapperen (Arch. Buikerindue. Nederland. Indie, 25 (1917), 

 No. 23, pp. 989-1004; Mcdcd. Proefstat. Jara-Suikerindus., Landbouvk. Srr., No. 

 9 (1917), pp. 16). — This reports the results of plant cane tests with first-genera- 

 tion and introduced cane of 247 B for the period of 1913 to 1916, inclusive. 

 The experiments were conducted on several fields representing two distinct 

 soil types. The results are held to indicate that imported cane was superior 

 to first-generation cane in point of yield of both cane and sugar. 



Statistics on the distribution and production of sugar cane varieties in 

 Java in 1912, van Harreveld {Arch. Buikerindus. Nederland. Indie, 25 (1917), 

 No. 42, pp. 1589-1634, fig*- 2; Mcdcd. Proefstat. Java-Suikcrindus., Landbouick. 

 Scr., No. 15 (1917), pp. 46, figs. 2). — Tabulated data are presented showing the 

 distribution and yield of sugar cane varieties grown in Java during 1912. 



Black Cheribon. 100 P. O. J., and 247 B occupied 8, 32, and 54 per cent, re- 

 spectively, of the total area planted to sugar cane while 56 other varieties occu- 

 pied the remaining 6 per cent. The average yields in standard muscovado, or 

 raw BUgar, for the three principal varieties amounted to 115.6, 123.4, and 124.3 

 pikols per hectare (from about 3.1 to 3.3 tons per acre), respectively. The aver- 

 age yield for the 56 other varieties was 113.3 pikols per hectare. 



Statistics on the distribution and production of sugar cane varieties in 

 Java in 1913, J. van IIarreveld (Arch. Buikerindus. Nederland. Indie. 26 

 (1918), No. 28, pp. 1241-1289, figs. 2).— This presents statistics for 1913 similar 

 to those noted above. 



Sugar cane varieties, J. Jeswiet (Arch. Buikerindus. Nederland. Indie, 25 

 (1917), Nos. 10, pp. 831-352, figs. 12; 21. pp. 913-946, figs. 15; 34, pp. 1369- 

 1411, figs. 20; Meded. Proefstat. Jara-Suikerindus., Landbouick. Ser., 1917 Nos. 

 S, pp. 22, figs. 12; 8, pp. 34. figs. 15; 12, pp. 43, figs. 20). — In a continuation of 

 work previously noted (E. S. R., 37. p. 443), numerous other sugar cane varie- 

 ties grown in the Dutch East Indies are described in considerable detail. 



Sugar cane variety tests in west Java, 1915-16, F. Ledeboer (Arch. Buiker- 

 indus. Nederland. Indie, 25 (1917), No. 13, pp. 451-462; Mcdcd. Proefstat. Jara- 

 Buikerindus., Landbouvk. Ser.. 4 (1917), pp. 12). — The results of extensive tests 

 are reported for the season indicated. 



Observations of sugar cane variety tests, van Harreveld (Arch. Buiker- 

 indus. Nederland. Indie, 25 (1917), No. 41, pp. 1573-1584; Meded. Proefstat. 

 ■lara-Suikcrindiis., Landbowok. Scr., No. 14 \1917), pp. 12). — This presents a 

 statistical study of variety tests with sugar cane to determine the effect of new 

 varieties on the total yield in Java. 



[Annual report of the Bureau of Sugar Experiment Stations], E. Jarvis 

 (Ann. Rpt. Bur. Sugar Expt. Stat. [Queensland], 17 (1917), pp. 1-29).— This 

 report reviews the progress of the cane BUgar industry in Queensland and the 

 production of cane and sugar during 1917. Considerable tabulated data are 



