Abstract
No report on the symptoms of molybdenum deficiency in tobacco has appeared in the literature. It seemed desirable, therefore, to determine and describe their nature since the information should be of value in mineral nutrition studies with tobacco. Production of molybdenum deficiency symptoms in Connecticut Broadleaf tobacco was accomplished in water cultures purified by either a modified calcium carbonate or 8-hydroxyquinoline (oxine) method. The type of equipment and fixed-charge technique has been described (4). The few changes made for micronutrient studies included use of nutrient solution purification, pure micronutrients, and water condensed from greenhouse heating steam in Pyrex glassware. Pyrex plates were also substituted for the masonite pressboard covers of the 2.5-gallon culture jars. The nutrient solution employed in the calcium carbonate purification experiments had the following composition:
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