Table 1. Relationships between peel Ca content and condition 

 'Baldwin' apples after 5 months storage in 32 F air. 



of 



The results of pressure tests were surprising. Low Ca apples 

 were 1.5 to 2.5 lbs firmer than high Ca apples (Table 1). However, 

 this was misleading because the apples were actually mealy. Drs. 

 Miklos Faust and C.B. Shear of the U.S.D.A. at Beltsville, Maryland 

 last year suggested that pressure tests may not be accurate for 

 low Ca apples, and this suggestion appears to be correct. The ap- 

 parently firmer low-Ca 'Baldwins' were definitely not of superior 

 quality to the high- Ca fruit. 



An 

 f 1 uence 

 answer 

 dergoes 

 duri ng 

 was com 

 effect 

 previ ou 

 i orati o 

 pened e 

 deteri o 

 have be 

 vest. 



other aspect of our study was to determine if Ca levels in- 



the time of fruit ripening. The best way to accurately 

 this question is to examine fruit respiration, since it un- 



a distinct rise and fall (the "respiratory climacteric") 

 ripening. When respiration of apples of varying Ca levels 

 pared, it was clear that the Ca levels had no significant 

 on time of ripening. This was somewhat surprising; the 

 s year's results showed so much more extensive fruit deter- 

 n with low Ca that we suspected that these apples had ri- 

 arlier. Since ripening rate was not affected by Ca, the 

 ration during and after storage attributable to low Ca must 

 en directly due to more rapid aging of the apples after har- 



We 

 in 1971. 

 tively h 

 were usu 

 for 1971 

 a major 

 ^Qry low 

 were tho 

 tend to 

 during 1 

 the high 

 of crop 

 that occ 



attemp 



This 



i gh in 



ally 1 



and 1 

 effect 



Ca we 

 se bea 

 bi enni 

 971 an 



yield 

 size 

 urs wh 



ted to 

 di d n 

 1972, 

 arger 

 972. 



on f r 

 re tho 

 ri ng h 

 al bea 

 d 1972 

 , high 

 n frui 

 en cro 



pred 

 ot wo 



and 

 than 

 In Ta 

 ui t C 

 se be 

 eavy 

 ring, 

 . Th 



Ca t 

 t Ca 

 p si z 



i ct Ca le 

 rk. Tree 

 vice vers 

 high Ca a 

 ble 2, it 

 a level . 

 aring few 

 fruit cro 

 the Ca 1 

 e 1 ow y i e 

 rees of 1 

 m ay lie i 

 e is s m a 1 



vels 

 s 1 ow 

 a. W 

 ppl es 

 can 

 In b 

 frui 

 ps. 

 evel 

 Id, 1 

 972, 

 n the 

 1 ; av 



in 19 7 

 in Ca 

 e noti 

 , so w 

 be see 

 oth ye 

 t , and 

 Si nee 

 of i nd 

 ow Ca 

 and vi 

 vigor 

 ai 1 abl 



2 from 

 in 19 

 ced th 

 e exam 

 n that 

 ars , t 

 those 

 these 

 i V i d u a 

 trees 

 ce ver 

 ous ve 

 e Ca m 



the C 

 71 wer 

 at low 

 i ned y 



crop 

 he tre 



wi th 

 Bal dwi 

 1 tree 

 in 197 

 sa. T 

 g e t a t i 

 ay be 



a lev 

 e rel 

 Ca a 

 ield 

 size 

 es wi 

 high 

 n tre 

 s rev 

 1 bee 

 he ef 

 ve gr 

 di rec 



els 



a- 



ppl es 



data 



had 



th 



Ca 



es 



ersed 



ame 



feet 



owth 



ted 



