l!>-_'0] FIELD CROPS. 531 



exist between the miniher of fruiting branches per plant and the number of 

 bolls per plant, and it was observed that when the environment favors the 

 production of a larger number of fruitinj^ branches than the mean for the 

 variety there was not a cori'esponding increase in number of bolls per plant. 

 The correlation between the length of the fruiting period and other physical 

 characters was shown not to be nearly so close as usually supposed. The data 

 further indicated- that the i)ercentage of lint was negatively correlated with 

 weight of seed and length of lint, and the highest correlation was found to 

 occur between weight of boll and weight of seed. 



Upland long; staple cotton in Arkansas, K. A. Houson (Arkansas Sta. Circ. 

 Ifl) (1920), pp. .'/, fi(j. 1). — A brief discussion is presented of the importance and 

 value of producing upland long staple cotton in Arkansas, and the areas of the 

 State adapted to the production of staples 11 in. and longer, 1 to IJ in., and 

 about 1 in. and less are pointed out. The length, percentage, and yield of 

 lint of Foster and Webber, two upland long staple varieties, are comi)ared with 

 those of Triumph, a variety of short staple. 



The cultivation of cotton in the Ottoman Empire (U. S. Dcpt. Com., Bur. 

 Foreign and Dom. Com., Com. Rpts. No. 7^ (1920), pp. 1725-1727).— A brief re- 

 port of the methods of cultivation and the chief producing regions of the crop 

 in Asiatic Turkey. 



Correlation between depth of eyes and degeneration among; i)otatoes, 

 O. B. WiiiPPLK (Proc. Anicr. Soc. Ilort. Sci., 16 (1919), pp. ISl-lS.i).— After 

 three years' work at the Montana Experiment Station with a deei)-eyed potato 

 variety in an endeavor to improve the commercial value by selecting to a 

 shallower-eyed type, the yielding power was greatly reduced, and careful 

 field counts showed 90 per cent of the plants to possess' degenerate tendencies. 

 Studies of hills and tuber characteristics in seed plats planted in 1919 on a 

 tuber-unit plan and classified as normal-vigorous, intermediate, and degener- 

 ate, showed conclusively that shallowness of eye was con-elated with de- 

 generacy. In practically all varieties, the most perfect tubers as regards size, 

 form, and depth of eye. came from intermediate plants, while in advanced 

 degenerate types the depression about the eye was often entirely absent. 



Thinning as a possible substitute for seed pieces of uniform size in 

 potato tests, O. B. AVhippi.e (Proc. Amer. Soc. Hort. Sci., 16 (1919), pp. 179- 

 ISl). — Tests at the Montana Experiment Station to determine the value of 

 thinning as a substitute for seed pieces of uniform size are described. All hills 

 were thinned to a single stem as soon as the plants were large enough to pull. 

 Plats planted with seed pieces averaging 1.04 oz. gave average yields of 20,r)75 

 lbs\ of marketable tubers per acre, while those planted with seed pieces weighing 

 0.33 oz. yielded 19,447 lbs. per acre. On other plats 1.3 oz. seed pieces yielded 

 17,SG7 lbs. compared with 10,097 lbs. from 0.33 oz. see<l. Field counts before 

 thinning showed plats planted with 1.3, 1.04, and 0.33 oz. seed to average 2.27, 

 2.22, and 1.47 stems per hill, re.s-pectively. Results, though not conclusive, show 

 that variations in yield following planting of large and small seed pie«^es are 

 largely a matter of stand, i. e., the number of plants produced per seed piece 

 planted. 



[Proceedings of the New Jersey State Potato Association] (iV. J. Dcpt. 

 Ayr. Uicl. 24 (1920), pp. 2.')7-319). — This comprises a report of the annual meet- 

 ing of the a.ssociatiou held at Trenton in January, 1920. The following papers 

 were presented : 



One of the Controllable Factors in Potato Growing, With Special Reference to 

 Losses From Poor Seed, by H. R. Talmage; The American Giant Situation in 

 Washington County (N. Y.), by J. M. Hurley; I^e.sson.s Learned From Seed 

 Inspection Last Season, by M. T. Cook; Seed Certification in New Jersey, by 



