- 6 - 



Although leaf samples were washed with distilled water before analy- 

 sis, there is the possibility that traces of calcium spray residue 

 contaminated the samples and accounted for at least part of the 

 difference between the apparent effectiveness of foliar and soil 

 applications. 



(r = + 

 fruit 

 harve 

 thi s 

 sampl 

 were 

 tent, 

 a 50% 

 group 

 in po 

 corre 

 9 2% 1 

 t i n s 

 fects 

 the i 

 low c 



Never 

 .775) 

 . Th 

 St li 

 table 

 ed fo 

 from 

 rega 

 diff 

 s. T 

 sthar 

 spond 

 ess i 

 hip t 

 on i 

 n i t i a 

 a 1 c i u 



thele 

 betw 

 e imp 

 fe of 

 , dat 

 r f ru 

 trees 

 rdl es 

 erenc 

 his 5 

 vest 

 ed to 

 ntern 



the 

 ntern 



1 rel 

 m con 



ss , 

 een 

 orta 



the 

 a ar 

 it r 



kno 

 s of 

 e i n 

 0% d 

 f rui 



a 1 

 al b 



occ 

 al b 

 atio 

 tent 



there w 

 leaf ca 

 nee of 



f rui t 

 e prese 

 e s p i r a t 

 wn to b 



treatm 



either 

 i f feren 

 t behav 

 7% lowe 

 reakdow 

 urrence 

 reakdow 

 n s h i p t 



was st 



as a 

 lei um 

 peel 

 is cl 

 nted 

 i on , 

 e rel 

 ent . 



peel 

 ce wa 

 i or . 

 r res 

 n , an 



of s 

 n and 

 bit 

 r i k i n 



highly s 



content 



cal ci um 



early i 1 



for only 



The sam 



a t i V e 1 y 



It can 



or 1 eaf 



s relate 



Fifty p 



pi ration 



d 85% le 



cald. I 



decay w 



ter pit, 



g 



i g n i f 



and 

 conte 

 1 us tr 



the 

 pies 

 1 ow 

 be se 



cal c 

 d to 

 ercen 



rate 

 ss de 

 t is 

 ere i 



but 



i cant 

 peel 

 nt in 

 ated 

 two g 

 i n th 

 r hig 

 en th 

 ium b 

 a dra 

 t mor 

 , 64% 

 cay. 

 p s s i 

 ndi re 

 the 



correl 

 cal ci um 



rel ati 

 in Tabl 

 roups 

 ese two 

 h in ca 

 at ther 

 etween 

 m a t i c d 

 e fruit 



1 ess b 



It had 

 ble tha 

 ct, ari 

 veral 1 



a t i n 



of the 

 on to post- 

 e 2. In 

 f trees 



groups 

 Icium con- 

 e was about 

 the two 

 i f f erence 



cal ci um 

 itter pit, 



no rela- 

 t the ef- 

 sing from 

 effect of 



Table 2 



Relationship of calcium content of 'Baldwin' apples to 

 their postharvest life. 1971-1972. 



Peel Ca 

 content 



Respiration 



rate 



(MgC02/kg-hr) 



45.6 



37.5 



Bitter 

 pi t 



Scald 



TIT" 

 57 

 53 



Internal 

 breakdown 



12 

 1 



Decay 



34 

 5 



% 

 0.048 



1 



0.074' 



T%) 



82 

 30 



1 



Leaf calcium averaged 0.67% 



Leaf calcium averaged 1.09% 



This experiment employs only the cultivar 'Baldwin' but we 

 suggest that relationships similar to those seen here exist for 

 other apple cultivars as well. 



