FIELD CROPS. 737 



0.25 per cent lower than in the beets grOwn normally. Defoliation retarded 

 the formation of dry matter and decreased the consumption of plant food, 

 while it but slightly affected the quality of the beet. 



The more nearly complete defoliation on July 31 reduced the yields of beets, 

 leaves, and sugar 24 per cent. 23 per cent, and 30.5 per cent, respectively. The 

 sugar showed a reduction of 1.1 per cent as compared with that of plants from 

 which no leaves had been taken. When harvested the defoliated plants con- 

 tained 30 per cent less nitrogen, 28 per cent less potash, and 18 per cent less 

 phosphoric acid than the check plants. 



Removing 10 per cent of the foliage on August 21 decreased the yield of beets 

 by 13 per cent, increased the yield of leaves by 3 per cent, and decreased the 

 yield of sugar by 13 per cent. The sugar content remained unchanged. 



The results of another series of experiments showed that the removal of from 

 50 to 94 per cent of the leaves reduced the yield of roots from 10 to 2G per . 

 cent and diminished the sugar content from 0.5 to 2.7 per cent. When only 

 from 20 to 25 per cent of the leaves were taken off the yield of beets was low- 

 ered by from 1 to 14.4 per cent, while the reduction in sugar content was un- 

 important. It was observed, however, that in case the leaf growth was very 

 luxuriant even moderately defoliating the plants proved injurious in this regard. 



Experiments with, varieties of sugar cane, J. P. D'Albuquebque and J. R. 

 BovELL {Rpt. Agr. Work Barbados, Imp. Dcpt. Agr, West Indies, 190-'/-1906, 

 pt. 3, pp. 91). — Experiments with seedling and other varieties of canes were 

 made on different estates and the results secured are tabulated in detail and 

 are also briefly discussed. 



On black soils the best results as plant canes were given by D.95, yielding 

 9,216 lbs. sucrose per acre, as compared with G,STG lbs. for White Trans- 

 parent. This ditference in yield of sucrose I'epresents an increased value of 

 $24.34 per acre. D.95 was followed by B.1520, B.147, D.1438, B.376, and B.208 

 in the order named. As plants and i-attoons on red soils B.1566 gave a yield 

 "representing a gain of $47.30 over White Transparent. Good results on the 

 red soils were also obtained from B.376, D.95, B.208, and B.1529. 



Annual report on sugar manufacture, J. Bock (JaJircsbcr. Zuckcrfahrlk. 

 [Stamiuer^. Jf6 {1906). pp. XI + 3-jl. figs. 32). — This report is a compilation 

 of the results of agricultural investigations on the sugar beet and of technical 

 exiieriments in the manufacture of sugar. The results of chemical research 

 work are given in abstract form. The report also contains a list of patents 

 in relation to the beet sugar industry, and gives statistics on beet culture and 

 sugar production in different countries, together with legislation affecting the 

 production and commerce of sugar. 



Correlation in different varieties of Vicia faba, K. Orphal (Laiidw. Vers. 

 Stat., 67 {1901), Xo. 5-6, pp. 331-J,06; abs. in FiiMing's Landtc. Ztg., 57' {1908), 

 No. 1, pp. 29-36). — The varieties studied were the German marsh bean and the 

 Dutch marsh bean representing I'/r/r/ faha major, and the small Halberstadt, 

 Eckendorf. and Kirsche field beans representing T. faba minor. 



The observations and measurements showed that in all varieties the correla- 

 tion between the weight of the plant and the weight of the grain was complete, 

 between the weight of the plant and the weight of the pods and the number of 

 grains was vei*y evident, and between the weight of the plant and the thickness 

 of the stem and the number of the pods was (piite apparent. The length of the 

 internodes was but little influenced by the length of the stem. 



In addition to determinations of the correlation, it was observed that the 

 water rtMinircments of 1'. faba during the growing period are in general very 

 high. In the first half of the growing period the Dutch marsh beau withdrew 



