Host: burley tobacco (Nicotiana tabacum (burley type)
Description: The most easily observed symptom of N deficient tobacco is the yellowing (chlorosis) of the leaves due to reduced chlorophyll levels. The yellowing begins in the lower leaves and moves upward as the deficiency increases. Under severe deficiencies, the entire plant will show a decrease in normal green color with bottom leaves changing from a light yellow to a brown or dead appearance. This drying-up or "firing" appearance may also result from water shortages during drought conditions. N deficient plants are usually normal in shape but less than normal in size. Leaves are generally smaller, thinner, and more upright on the stalk than when N is adequate. Waterlogged or flooded soils and turning under of thick stands of non-leguminous crops or sods without sufficient time for decomposition are conditions often associated with N deficiencies.
Image type: Field
Image location: United States
Specimen in collection: No
Name: R.J. Reynolds Tobacco Company Slide Set
Organization: R.J. Reynolds Tobacco Company
Country: United States