THE GROWTH OF TOBACCO AT CERTAIN SOIL TEMPERATURES AND NUTRIENT LEVELS IN GREENHOUSE

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Abstract
Two varieties of tobacco, Hicks, a flue-cured variety, and Resistant Havana 211, a cigar variety, were grown at soil temperatures of 46°, 59, 72° and 85°F. in a greenhouse. Three rates of each: N, P2O5, and K2O were applied in a factorial combination. The best soil temperature for growth was around 72°F. as indicated by measurements of leaf weight, leaf area, number of leaves, stalk weight, and stalk length. The 46°F. soil temperature was too low for good growth. Resistant Havana 211 grew better generally at the low and high soil temperatures. Phosphorus appeared to be the most important and beneficial nutrient element for growth at the lower soil temperatures.

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