Image Number: 1440088

Descriptor:
Damage
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

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Image location:
United States

Subject

Kingdom: Other damage agents
Phylum: Other damage agents
Class: Other damage agents
Order: Abiotic
Family: Nutrient deficiency
Subject: nitrogen deficiency

Host

Kingdom: Plantae
Phylum: Magnoliophyta
Class: Magnoliopsida
Subclass: Asteridae
Order: Solanales
Family: Solanaceae
Genus: Nicotiana
Subject: Nicotiana tabacum (burley type) L.
Node Affiliation:
Image uploaded:
Monday, January 1, 1990
Image last updated:
Tuesday, August 2, 2011