532 EXPERIMENT STATION RECORD. [Vol.40 



of beets is necessary to determine the development reproductively. The absence 

 of such a period of restrained metabolism results in a vegetative determination. 

 To reduce the intensity or duration of restrained physiological activity will result, 

 according to degree, in a determination intermediate between normal repro- 

 ductivity and complete vegetativeneas. When determination has been effected 

 a relative stimulation like that induced by the rise in temperature accompany- 

 ing the march of the season must follow to complete the full development of the 

 determined morphological phase. With this hypothesis it is found possible to 

 account for the occurrence of every phase In the morphology of both the wild 

 and the cultivated beet. 



" In the case of the cultivated beet it i-^ essentia] In many localities that some 

 portion of the period of restrained growth should take place during the winter 

 storage, in order to duplicate to some extent the exposure of the wild i>eet 

 seedling to the winter temperatures of it- natural habitat . . . 



"The physiological changes Induced in the growing point to determine one or 

 another form of development are not known. It is known that grape sugar is 

 present in and about the growing point of the crown buds ol beets and Btarcfa 

 is absent when conditions are favorable Cor reproductive determination, and 

 that the reverse Is true when conditions favor vegetative determination. 



Oxidase activities are much greater in the aerial parts of i ta whose growth 



has been restrained by pathological or other conditions than In those whose 

 growtli has been relative!] stimulated. It i- probable thai the biochemical 

 processes of the cells of the punctum vegetationls are more numerous and more 

 complex where reproductive Is ermlned than where vegetative 



grow tii is to ensue." 



The botany of the sugar cane, .1. M. GeSBTS (Plant kundi n/ii tut Suikerriet, 

 [Posoeroeaft], Java: Proefstat. Javaruikerindu*. [1916], /-/>. XIV +151, piU 

 tm.-. /")i This boos is designed primarily for the use of sugar cane plant 

 ami deals in a rather popular but comprehensive manner with the external 

 and internal structure of sugar cane, the life proc< the plant, the propa- 



gation of cane, variability, heredity, hybridisation, etc 



New varieties of sugar cane. K < ' . M ■ I {Rev, \gr. Puerto RiCO, 1 



[1918), No. i ■ '. pp. /J/7 1. Tabulated data are presented, showing the yields 

 of -•"> varieties of sugar <an<- grown in Porto Rico during 1615, 1916, and 1917. 



Thick v. thin canes for planting. A. H. BosENFELO (Internet, Sugar lour., 

 20 {1918), We. 888, )>i>. 303-300).- This reports the results of experiments 

 undertaken at the Tucuman Experiment station in 1911 to determine whether 

 thin canes transmitted ■ tendency to thai type of growth or whether the <har- 

 acter was simply the result of some unfavorable condition of growth during the 

 year. 'The average yields of cane from two plantings of thick and thin canes 

 and two stubble crops amounted to 28,619 and 28,267 k^. per hectare (about 

 12.78 and 12*67 teas per acre), respectively, it Is concluded that, provided the 



Stalks planted are healthy, the thickness of the cane is of little iniportan 



Fertilizer experiments with sugar cane. .1. Mmwu <> .Ii^in (Philippitu 

 Jour. s,i.. Beet. l. M {1918), No. 8, pp. 186 / 1 ■>'. I This describes some 



rather limited fertiliser experiments with sugar cane bogus lo 1916 and made 

 on a clay loam soil near Los Bafios, 1'. I. 



The highest yields were obtained from applications of sulphate of ammonia 

 in combination with sulphate of potash or with double superphosphate, amount- 

 ing to 85.77 and 95.28 tons of cane p<-r hectare i.ts.s and :is.ti tons i«er acre), re 

 spectively. a complete fertilizer containing sulphate of potash, nitrate et soda, 

 aini double Buperphosphate showed the highest purity of juice, 90.16 per cent, 



with sulphate of potash next in order with 89.52 per cent purity, 



