FIELD: agriculture; vegetable production. SUBSTANCE: method involves assessment of a rate of decline in concentration of CO inside the cultivation compartment as the supply of gas is discontinued. The rate depends on the rate of photosynthesis and uncontrollable leaks. The device is provided with an additional external gage for metering CO concentration, and it is also adjustable for minimum and maximum concentration settings. EFFECT: higher assessment accuracy. 2 cl, 2 dwg
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