Science · 1961 · 13 citations · 1 references
AgricultureAgronomyPlant SciencesCrop PhysiologyPlant NutritionPlant PhysiologyFluoride NutritionFluoride UseFoliar NutritionNitrogen NutritionNutrient AvailabilityNutrient Deficiency SymptomsFluoride ContaminationFluoride ToxicologyFoliar Micronutrient ApplicationFoliar Nitrogen NutritionFoliar Nutrient ApplicationNitrogen Deficiency PhysiologyNitrogen Deficiency SymptomsNitrogen Deficiency Tolerance
Groups of bean seedlings (Phaseolits vulgaris) were grown concurrently in cleaned and fluoride-containing (4 to 7 , microg of F(-) per cubic meter) air in plant-growth chambers for 10 and 20 days with six water-culture treatments: Hoaglund's formulation and Hoaglund's minus potassium, calcium, nitrogen, phosphorus, and iron. An inadvertent 15-hour exposure on day 15 (at 42 microg/m(3)) produced foliar fluorosis symptoms only on the nitrogen-deficient plants fumigated 20 days, although higher fluoride concentrations were present in the foliage of similar plants grown in the other nutrient-deficient solutions.
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