FIELD CROPS. 41 



required nearly 2 lbs. of straw to produce a pound of grain. While a heavy 

 yield of straw was found to be correlated with a heavy yield of grain it was, in 

 turn, correlated with a small amount of meat." 



Report of the potato cultural experiments for 1912, F. ToCH (Arb. Deut. 

 Sek. Landeskiilf. Rat. Konigr. Bohtnen, No. 16 {1912), pp. ^8, pi. 1). — ^This 

 gives data and results of variety tests of potatoes throughout Bohemia under 

 the direction of the German section of the agricultural commission of Bohemia. 



The cultivation of rice in Spain, A. Takchetti (Gior. Bisicolt., 4 ii914), 

 Nos. 15, pp. 220, 221, fig. 1; 16, pp. 237-2/f3, figs. 5).— This describes systems and 

 improved methods. 



Field experiments covering 1913, A. W. K. De Jong (Dept. Lo/ndb., Nijv. 

 en Handel [Dutch East Indies], Meded. Agr. Chem. Lab., No. 7 (1913), pp. ^9, 

 figs. S). — This publication gives results of experiments conducted in 1913 that 

 show the advantage of plowing under peanuts (Arachis hypogea) as a green 

 manure for rice, and that a complete fertilizer was more satisfactory than a 

 nitrogenous fertilizer. 



On the weight and sugar content of sugar beets in relation to the area 

 at the disposition of each plant in the field, H. Pellet (Sucr. Indig. et Colon., 

 84 (1914), Nos. 3, pp. 59-61; 4, pp. 84-88, fig. 1; 5, pp. 104-108).— A French 

 translation of an article by Munerati et al. previously noted (E. S. R., 31, p. 

 633). 



Determination of ripeness in Pundia cane, R. G. Padhye (Poona Agr. Col. 

 Mag., 6 (1914), ^'o. 1, pp. 71-75). — From the results of cutting and analyzing 

 cane at different dates it was found " that the sucrose percentage was regularly 

 increasing every week till the cane was 12 months old and the glucose and fruc- 

 tose were decreasing. The purity was rising till it reached 92, after which it 

 began to fall. Thus this cane was found to be ripe exactly after 12 months. 

 When the purity was found to fall, cutting was immediately begun. ... It has 

 been found that the juice crushed in the laboratory mill is richer than that of 

 the power crusher, where the extraction is high, and consequently more impuri- 

 ties are extracted. ... In the juice of the perfectly ripe cane little fructose 

 seems to occur." 



Growing sugar cane for market, S. R. Paeanjpye (Poona Agr. Col. Mag., 

 5 (1914), ■^^o. 3, pp. 197-200, pi. 1, fig. J).— This describes the methods of grow- 

 ing soft, thick, white sugar cane for the Bombay market. The yield is noted 

 as averaging 19.800 good canes per acre. 



Spanish sulla [soola]. — Tested at Ruakura farm of instruction, A. W. 

 Gbeen (Jour. Agr. [New Zeal.], 9 (1914), No. 2, pp. 133-135, fig. i).— This 

 article gives results showing a superiority of Spanish sulla or Maltese clover 

 (Hedysarmn coronarium) over the African variety. The former produced an 

 estimated yield of 11 tons of green forage per acre and grew to a height of 

 3 ft. 6 in. 



The sweet potato : How to grow and keep it, J. G. Noedin (Russellville, 

 ArTi., 1912, pp. 50. figs. 14)- — In this book the author gives the results of his 

 ten years' experience in the production, storage, and marketing of sweet 

 potatoes. 



The chemical composition of Philippine sweet potatoes, S. D. Labaten 

 (Philippine Agr. and Forester, 3 (1914), No. 4> PP- 79, 80). — This article reports 

 analyses of 28 varieties of sweet potatoes grown on the college farm. 



It is noted that specific gravity bore little relation to the content of starch or 

 moisture and could not be used as an index of the commercial value of the sweet 

 potatoes. The percentage of moisture varied from 66.08 to 77.09, the starch 

 from 10.11 to 26.3, and the yield from 4,200 to 24,160 kg. per hectare (3,738 to 

 21,502 lbs. per acre). 



73227°— No, 1—15 i 



