884 



average yield of the fertilized plats was 83.1 bushels, of which 16.6 bushels or 20 per 

 cent were small. In other words, the use of manures caused a proportionate decrease 

 in small roots. 



[In experiment No. 1] those grown with chemical manures alone were bright and 

 smooth of skin, while at lea.st one third of those grown with barnyard manure were 

 rough and jjartially covered with scurf. * ' * It was a]»parent from the time of 

 setting the plants that the kaiuit was injurious, not perhaps because of tlie form of 

 potash, but because of the very large quantities of salt necessarily ajiplied in order 

 to secure the same amount of actual potash. * * * While the direct application 

 of both muriate and sulphate resulted in a dt'cide<l increase in jirofit. the kainit 

 caused a material loss. It should iu)t be argued from this, however, that kainit is 

 not a good source of potash, but rather that its direct application in large quanti- 

 ties may be injurious, as was also noted in the exi)erinu'nts with white imtatoes. 

 An earlier aj)i»lication of the suljdiate may also have been more effective than when 

 applied immediately before setting the plants. » ♦ * The form of nitrogen most 

 favorable was the dried blood, the gain being $9.68, or 31 per cent greater than from 

 the nitrate of soda. 



[The conclusions reached were] that (1) the yield of sweet potatoes may bo very 

 profitably increased by the use of chemical manures alone; (2) a combination of 

 chemical and barnyard manures is especially useful; (3) nitrogen is a valuable 

 ingredient in the fertilizers used for this crop; (4) organic forms of nitrogen, as 

 dried blood, are more desirable tlian nitrate of soda; (5) muriate of potash is more 

 useful tlian the otlier connncrcial forms. 



Analyses were m;ule of samples of the sweet potatoes from tlie dif- 

 ferently fertilized plats. The residts are not tabulated in the buUetin, 

 but will iqiiK'ar in the Annual Report of the stations. "The chief efleet 

 of manures upon composition was to decrease the dry matter, the loss 

 averaginjr about o i)er <'ent, and falliujj mainly upon the carbohydrates. 

 About (K) ])er cent of the crude protein in sweet potatoes exists in the 

 form of albuminoids. The sliglit increase in crude protein froiu tlie use 

 »)f mannn^s was followed in all cases by a i>roi>ortionate increase in the 

 albuminoids." 



New Jersey Stations, Special Bulletin ft, April 21, 1892 (pp. 12). 



Some FITNGOUS DISEASES OF CELKKV. W. 1 >. 1 1 \LSTi;i). I>. Sc. (fi,u:s. 

 14). — Accounts of celery l)lij;lit. Icat'spol. leal' l)li,-;lil. rnsl. and a bac- 

 terial <lisease. 



Cvlrry hlijiJif. — Ibief statements rei^ardinu' the conditions favorable to 

 the d(n'eloi)iiienl ot' <'elery blight [('( rcospora ((pii), and an a<"count of a 

 successful tield experiment in sprayinu' eeleiy |)lants once a week (from 

 Aufj^ust (5 to th<^ close of the season) with ammonia* a 1 carbonate of cop 

 per f(n" the repression of this disease. 



Celery leaf spot. — This disease was observed in a Held of celery in 

 New Jersey iu 1891, and is due to a species of fungus which the author 

 proposes to call riiylhsfirfo apii. Portions of a leaf ali'ectcd with the 

 disease and tlM> spores of the fungus are illustrated. 



The PhiiUoxtirIa begins .as a dull brown ]).it(li. never becoming of the liglil asjiy 

 color so cliaractcristic of flic rrc(v».'</>«c(( in one of its st.ages. In tlie PlniUoxlii-lu the 

 leaflet nuiy be attacked only iu one spot, wluch continues to enlargo until the 



