634 EXPERIMENT STATION RECORD. [Vol 40 



average yields of 26.5 tons of cane per acre for potash alone as compared with 

 25.2 tons for the untreated check. The highest yield, 47 tons per acre, was 

 obtained with potash and 500 lbs. of sulphate of ammonia. These results are 

 held to indicate that the supply of, immediately available potash in the soil 

 is somewhat depleted, and that the nitrogenous fertilizers as well as the avail- 

 able soil nitrogen can not exert their full effect without the aid of potash. 



The production of new varieties of sugar cane, P. GonzAt.ez Rfos (Rev. Agr. 

 Puerto Rico, 2 (1918), No. 1, pp. 29-38, figs. 8).— This is a resume" of work dpne 

 by H. B. Cowgill at the Porto Rico Insular Experiment Station in developing 

 new varieties of sugar cane, chiefly through hybridization. 



Sugar cane experiments, 1916-1918, J. de Verteutl (Bui. Dept. Agr. Trini- 

 dad and Tobage, 11 (1918), No. 3, pp. 135-11(2).— The usual statistical data on 

 the yields of both plant and ratoon canes grown in variety test-; are presented 

 in a continuation of work previously noted (E. S. R., 30, p. 839). 



The leading varieties with respect to the amount of sucrose In the .1ulce 

 were B 156, T 202, and B 208. with 4.54, 4.06, and 3.99 tons per acre, respec- 

 tively. The yields of plant cane for these varieties amounted to 44.41, 35.32, 

 and 32.72 tons, respectively. 



Some normal and anomalous mutations in sugar cane. G. L. Fawcttt (Rev. 

 Indus, y Agr. Tucuman, 8 (1917), No. 1-2, pp. 33-40, figs. 2).— The author pre- 

 sents a general discussion of variations in different types of sugar cane, with 

 particular reference to the coloring of the stalks and to fasciation. 



Planting tests with Java and Creole sugar cane, W. E. Cross (Rrv. Influx, 

 y Agr. Tucumdn, 9 (1918), No. 3-.',. pp. 48-50, fig. 1).— Field tests made at 

 Tucuman, Argentina, during 101 S resulted in an average yield of cane of 

 35,584 kg. per hectare (about 15.83 tons per aero) from Java 30 grown from 

 seed cane cut just previous to planting, as compared with only 17.111 kg. per 

 hectare from that grown from cane cut 9 days before planting. Under similar 

 conditions, Creole produced 21,800 and 22,333 kg. per hectare, respectively. 



Methods for preventing the decomposition of frosted sugar cane, W. E. 

 Cross (Bet?. Indus, y Agr. Tucuman. 9 (1918), No. 3-4, pp. 51-56, figs. 2).— Field 

 tests made with several varieties of cane at Tucuman, Argentina, during 1!>1S 

 are described, in which a comparison was made of cane left standing in the 

 row with that placed in windrows or topped for the prevention of frost injury, 

 as suggested by work done at the Louisiana Experiment Station (E. S. R.. 7, 

 p. 492). The results are said to indicate that these practices were not only 

 useless but led to a much more rapid deterioration than that observed in 

 standing cane. 



[Work with sugar cane in Hawaii. 19181. IT. P. Agee (Hawaii. Sugar 

 Planters' Assoc, Rpt. Expt. Sta. Committee. t918, pp. 25-39).— This reports the 

 continuation of work along the same general lines as previously indicated 

 (E. S. R., 39, p. 741). 



An acreage census of [sugar] cane varieties for the crops of 1918. 1919, 

 and 1920. H. P. Agee (Hawaii. Sugar Planters' Assoc. Circ. 32 (1918). pp. 

 S8). — Tabulated statistics are presented showing the different varieties of 

 sugar cane and the area devoted to each for the crops indicated on the islands 

 of Hawaii, Kauai, Maui, and Oahu. Yellow Caledonia, occupying about 108,000 

 acres, is said to be by far the leading variety in point of area. 



[Experimental work with sugar cane], H. T. EastXBBY (Ann. Npt. Bur. 

 Sugar Expt. Stas. [Queensland], 18 (1918), pp. 31).— This reports the continua- 

 tion of work conducted during the year ended October. 1918, along the same 

 general lines as that previously noted (E. S. R., 87. p. 540). 



