-2- 



at a. relatively constant composition. Requirements to automate these two periods 

 are different and it should be recognized that the commercial units presently 

 available attempt to generate the required atmosphere as needed or in excess, 

 thus reducing the requirement for relative gas tight room. However, a certain 

 degree of gas tightness is still required and lower operating costs are achieved 

 with a tighter room. 



If one generates the required atmosphere, instead of achieving it biologJcally 

 one is attempting to gain a fruit quality advantage from a rapid O2 drop. If one 

 generates the atmosphere in excess, he minimizes the need for automatic controls, 

 since the atmosphere generator components can be progranmied with time clocks or 

 other devices, although this makes lowest cost operation difficult. The advantage 

 in rapid O2 drop has not been substantiated at this station in studies over 

 three seasons. However, a rapid O2 drop has some operating advantage in that a 

 CA room could be opened, partially unloaded and then operated again as CA, 



John W. Zahradnlk 



Agricultural Engineering Department 



I I I I I I I I I I I I I I I I 



POMOLOGICAL PARAGRAPH 



New Publication s Available 



The following publications have recently been printed and are available by 

 writing to the Mailing Room, University of Massachusetts, Amherst, Massachusetts. 



Raspberry Growing. Extension Leaflet 48. Revised May, 1963. 



Controlling Weeds in Small Fruit Plantings with Chemicals. Special Circular 

 215. April, 1963. 



Out of Storage Movement and Prices of Mcintosh Apples in Massachusetts. 

 Publication 388. January, 1963. 



---William J. Lord 



I I I I I I I I I I I I I I I I 



DAMAGE TO BAGGED McINTOSH APPLES IN SHIPPING CONTAINERS 



BY IMPACT 



Shipping tests conducted with Starr apples by F . A. Perkins in New Jersey 

 have shown that placement of the bags within a master carton materially affects 

 the quality of the fruit. Less damage to apples occurred when twelve, 4-pound 

 bags were laid horizontally in two tiers as compared to that occurring in a 



