636 EXPERIMENT STATION EECORD. 



During the first period of growth the percentage of phosphoric acid was 

 influenced by fertilizers but not subsequently. The percentages of calcium and 

 magnesium did not vary greatly in the several periods. At maturity the calcium 

 is largely stored in the leaves, the magnesium in the grain. The hydrolizable 

 carbohydrates vary inversely with the nitrogen absorbed 



During the early growth the percentages of nitrogen, phosphoric acid, and 

 potash are high, but these are gradually reduced during later development. 

 Seasonal variations influence growth and composition especially during the first 

 period. When two- thirds grown the rice plant has taken up about four-fifths 

 its maximum nitrogen and phosphoric acid, and nine-tenths of its potash, so 

 fertilizers should be applied before or soon after planting. 



Reducing sugars occur in notable quantities at all stages of growth, especially 

 during the first period. Sucrose occurs as a trace during the first period and to 

 the extent of 10.38 per cent during the second, but has largely been converted 

 into starch at maturity. Starch gradually increases from the first period to 

 maturity when it is largely stored in the grain. Pentose-forming bodies con- 

 stitute a large percentage of the plant at every stage, reaching practically a 

 maximum at flowering. Cellulose also almost reaches a maximum in the second 

 period and occurs in large quantities in all parts of the plant except the grain. 



Eeport of the Krasno-Ufi.msk Industrial School for 1908, S. Levochkin 

 (Abs. in Zhur. Opytn. Agron. (Russ. Jour. Expt. Landw.), 11 (1910), No. 3, p. 

 402). — The yield of winter rye was increased following a complete fertilizer 74 

 per cent, with nitrogen and phosphorus 61 per cent, with phosphorus alone 44 

 per cent, and with nitrogen alone 22 per cent. With kainit the yield was some- 

 times lowered. 



Influence of the depth of turning under artificial fertilizers on the yields 

 of sugar beets, V. Y. Bukraba and K. F. Mubashko {Khozidistvo, 1909, Nos. 

 26, 21; ahs. in Zliur. Opytn. Agron. {Russ. Jour. Expt. Landw.), 11 (1910), 

 No. 1, pp. 110, 111). — These experiments were carried out at the Kiev Poly- 

 technic Institute in 1907 and 1908 on small plats (49 sq. ft. each in 1907 and 

 204 sq. ft. in 1908). The fertilizers were worked under at depths of 5, 10, 20, 

 and 25 cm. In the rather rainy year 1907 20 cm. proved the most favorable 

 depth, while in the rather dry year 1908 10 cm. proved the optimum. 



Sugar beet culture and the manufacture of beet sugar, A. Stift and 

 W. Gkedinger (Dcr Zuckcrriibcnbau und die Fabrikation des Riibenzuckers. 

 Vienna and Leipsic, 1910, pp. VIII+667, figs. 273). — This book is intended 

 for the instruction of the embryo technologist and as a ready reference for the 

 mature sugar manufacturer and beet grower. 



Report of Harvard Experiment Station, E. F. Atkins (Cuba Mag., 2 (1911), 

 No. 5, pp. 25-29). — A report of operations with sugar cane at the Harvard 

 Experiment Station at Cienfuegos, Cuba, where experiments with economic 

 tropical plants are in progress under the auspices of Harvard University. 



As little rain fell between October 15, 1909, and June, 1910, many foreign 

 varieties were killed. Reports of the condition of the seedling canes showing 

 extracted sucrose in excess of 12 per cent are given, together with numerous 

 analyses of seedlings and rattoon canes. 



Work of experimental stations in 1909 (Canada Dept. Agr., Tobacco Div. 

 Bui. A9. pp. 51, j)ls. 12). — This bulletin consists of three articles. 



I. Experimental stations for the growing of tobacco, F. Charlan. — The author 

 gives a brief progress report of work done at the St. Jacques, St. Cesaire, and 

 Harrow stations. 



II. Work of the tobacco division in the Province of Quebec in 1909, O. Che- 

 valier. — This is a progress report of work done in continuance of that already 



