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Description: The vaporization of liquid nitrogen has been used as a cooling medium for many purposes, including winter hardiness testing of fruit trees (1) and in extensive medical and industrial applications. Its use for temperature control in plant growth chambers is limited because an atmosphere of nitrogen gas does not support normal active plant growth processes (2). The purpose of this report is to describe a cabinet that uses liquid nitrogen to obtain con trolled low temperatures for cold hardiness testing of plant material, and to discuss its operating economy. Plant material within the cabinet is insulated from direct contact with the nitrogen gas by sealing in polyethylene bags.The cabinet (Fig. 1) is made of 10 cm thick rigid urethane, covered with fiberglas and lined with stainless steel. It has a working volume of 0.6 X 0.6 X 0.6 m. Removable perforated metal shelves support the plant material. Liquid nitrogen is admitted to the cabinet via a solenoid valve (A, Fig. 2) by a spray boom

Keywords: a cold hardiness cabinet
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Citation: Voisey, Peter W. and C. J. Andrews 1970. A COLD HARDINESS CABINET. Canadian Agricultural Engineering 12(1):55-56.
Volume: 12
Issue: 1
Pages 55 - 56
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Date: 1970
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Coverage: Canada
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