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Cornell Fruit Handling and Storage Newsletter


Controlled atmosphere storage for hard crisp apples


Oxygen Concentrations in CA. The increasing demand for hard apples and the research data that shows better firmness with lower oxygen have motivated some operators to use oxygen concentrations below the recommended range of 2.5 to 3.0 percent. Two'New York operators suffered losses from low oxygen injury last winter. The injury would not have occurred if these operators had the margin-for-error that is available when rooms are held in the recommended range. At some future date we may lower the recommended range of concentrations for oxygen, but that recommendation will be accompanied by additional harvesting and handling recommendations and also recommendations for atmosphere analytical and control equipment that is not presently used in our commercial CA rooms. Until then, play it safe 2.5-3.0% 0.

Source: • Cornell University

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