IIl8 SUGAR CROPS 



A description is given of the 2 most important varieties of sugar cane 

 grown from seeds in Java and designated by the numbers 247 B and 100 



P. O. J. 



The origin of No. 247 B. is somewhat doubtful and it is probably to 

 be attributed to a cross of the laji cane with the Cheribon cane as the female 

 parent. 



The variety 100 P. O. J. was obtained by accidental hybridisation of 

 the original black Borneo cane, probably with the Loethers cane. The 

 writer believes that the latter may be identified as the male parent on 

 comparing different characters of the cane 100 P. O. J. with those of the 

 lyoethers variety. 



A minute description is given of the various morphological characters 

 of these 2 varieties, on the basis chiefly of the insertion and dispersion of 

 the hairs over the buds, and on the shape of the internodes. 



S66 - The Problem of Nitrogenous Manuring of the Sugar Cane in Java (Sulphate of 

 Ammonia or Oil Cakes ?); Results of 10 Years of Experiments. — ciEERxs j. m., in 



Mcdcdeciingen van het Procfstation voor de Java-Suikerinduslrie, Archicf voor de Suikcrin- 

 dustrie in Nederlandsch- Indie, XXI Vth year, Part 14. Soerabaja, April 191 6. 



The importation of sulphate of ammonia general!}^ used for manuring 

 the sugar cane having become very uncertain and difficult, the question 

 of finding a substitute for it is one of primary importance. It appeared 

 possible to find the solution of the problem by making a digest, from one 

 and the same point of view, of all the results obtained for 10 3'ears of expe- 

 rimental manuring of the sugar cane in the field and calculating them uni- 

 fornil}'. This has now been done, and the results given by earthnut cakes 

 have been compared with those yielded by sidphate of ammonia. 



The conclusion reached is that the former cannot be deemed equal to the 

 latter. A mixture of the two manures gives better results than the use of 

 oil cakes alone. 



In rather sandy soils, the oil cakes produce better results than in clayey 

 soils. The nitrogen in sulphate of ammonia not being so expensive as that 

 in oil cakes it is more economical to use the former. 



The production of the sugar cane is less when oil cakes are used than 

 with sulphate of ammonia, but the richness in sugar is not affected. 



^67 - A Pre-fermentation in Special Stacks of Tobacco. — deVrieso., iwMcdedecUngen 



van het Proefstation voor Vorstcnlandschc Tabak, No. XXIII, pp. 69-88. Semarang, 1916. 



In 1914 the tobacco-growing season in a part of Java was marked b} 

 great dryness. 



The tobacco harvested during these times of drought frequently shows 

 traces of the pressure undergone after fermentation, these traces remaining 

 visible in the form of streaks and spots on the leaves when put up into 

 bundles for the market. 



Experiments were made in 1914 to remedy this drawback, which con- 

 siderably reduces the value of the tobacco. Fermentation stacks were de- 

 signed the centre of which remained empty, and in which the air could circu- 

 late more freely than in the ordinary form of stack. Taking care that the 



