FIELD CHOPS. 935 



parts of siipar. Some varieties of seed produced more potash and others less in 

 the root. The differences ohserved ranged from 0.2 to 0.7 i)arts of potash per 

 loo parts of sugar. 



Experiments with seedling and other varieties of canes, J. I*. D'Albu- 

 giKRQUE and J. K. Bovell (Rpt. Agr. Work Jiarhados, Imp. Dcpt. Agr. West 

 Indicfi, 1900-1901, pi. 3, pp. 99). — This publication is the customary tabulated 

 report, with brief comments, on this work carried on under the direction of the 

 Imperial Dei>artment of Agriculture for the West Indies. The period covered 

 is for the season between 1905 and 1007. The experiments were conducted in 

 the same maimer as previously noted (E. S. R., 19, p. 333). 



On the black soils cane B. 3690 ranked first, with a yield of 2,045 lbs. of 

 saccharose jier acre in excess of that secured from White Transparent, the 

 standard cane. B. 208 i-ankwl second and B. 147 third, with increased yields of 

 1,494 lbs. and 922 lbs. of saccharose, respectively, over White Transparent. On 

 the red soils, as plants and rattoons, B. 1566 stood first with 8,.394 lbs. of 

 saccharose per acre as plants and 6,645 lbs. as rattoons, while White Trans- 

 parent as plant canes gave only 6,006 lbs. and as rattoons only 5,736 lbs. per 

 acre. The average results from the best varieties during the past 4 seasons 

 indicate that B. 3696, B. 1753, B. 1529, B. 147, and B. 208 are apparently the 

 i>cst varieties for the black soils, and B. 3405, B. 3412, B. 3390, B. 1566, B. 208, 

 B. 1529. and B. 376 for the red soils. The seedling canes origina((>d, selected, 

 and tested in these experiments show a marked sui)eriority in many instances. 

 On the l)lack soils the average results for 3 and 4 years, arranged according to 

 saccharose yield, show that White Transparent stood last in a list of 90 with 

 6.670 lbs. of saccharose, while the seven best varieties gave an average of over 

 9.000 lbs. 



[Variety tests with sweet potatoesl, O. M. Morris (Oklahoina Sta. Rpt. 

 190H, pp. Li, 13). — The following varieties of sweet potatoes, with the yields 

 per acre reported, were grown on thin upland soil of poor quality with a hard- 

 pan subsoil : Black S])anish <;,795 lbs.. Blooming .5,094 lbs., Early (Jolden 17,771 

 lbs.. Extra Early Carolina 9,460 lbs., Hanover Yam 11,585 lbs.. Red Bermuda 

 l.~.,;i09 ll)s.. Red Nancemond 4.K07 lbs.. Red Nose 9,889 lbs.. Southern Queen 

 (i.l43 lbs., Vineless 981 lbs., Vineless Pumpkin Yam 10,371 lbs.. Yellow Jersey 

 6,328 lbs. 



Tobacco experiments, IT. Jenskn (Jaarb. Dcpt. Landb. l^'cdcrland. Indie, 

 1907, pp. 199-211, phs. 3, dgiii. I). — The results of experiments here described 

 indicate that rultber .solutions can not be used for comliating phytophthora. In 

 a jilant breeding test it was found that the chances of securing a fixed broad 

 leaf variety from an individual jilant showing this characteristic were very 

 small. It is believed that the jilant with which the test was begun was a cross 

 between a narrow and a I»road leaf plant, and that for this reason the progeny 

 broke up into many forms. A cross between Canary and Deli tobacco i)roduced 

 good plants practically free from mosaic disease, although the mother plants 

 had been so attacked by this disease that they had iniproi)erly developed and 

 were almost dwarfed. 



Reciprocal crosses between White Burley and Peru followed MeiKlel's law in 

 part only. Some of the indivi^liials showe<l characters int(>rmediate between the 

 male and female parent in the first generation. The veins of the pure White 

 P.iirley jilants were light in color, which is regarded as a r<>cessive character, 

 while the veins of the crosses with Peru and Can.iry were normally green. 

 With reference to the base of the leaf and the size of the plants the crosses 

 were intermediate. The leaves in the hybrids had long stems, which is a char- 

 acter iirevailing in Peru tobacco, and is therefore looked upon b.v the author 

 as probably a (Uuninant character derived from that variety. 



