nitrogen and iron chlorosis #163031 - Ask Extension

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nitrogen and iron chlorosis #163031

Asked December 29, 2013, 9:49 PM EST

what is the conceptual reason for the particular places in the plant  where nitrogen and iron chlorosis occurs? besides  that nitrogen chlorosis will start in the older leaves and  that of iron in the younger leaves due to their mobilities.

Washington County Outside United States

Expert Response

The place may not have enough nutrient in total quantity or not enough nutrient in plant-available forms. Soil pH is one main reason that nutrients are not available in many cases. N is mobile-----new leaves are a greater 'sink', so when there's not enough N, N moves from older leaves to newer leaves and N deficiency shows up in older leaves first. Fe is immobile. When there's not enough Fe, the deficiency shows up in newer leaves.
Mengmeng Gu Replied January 06, 2014, 2:35 PM EST

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