Copper deficiency-Corn | Yara United States

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Nutrients

Corn - Chlorosis

Symptoms
The youngest leaves show yellow interveinal discoloration as they come out of the whorl. Mainly the basal part of the leaf is uniformly yellowgreen.

Reasons
Mild copper deficiency. Copper deficiency in corn is rarely seen. N + S deficiency and cool weather produce symptoms similar to mild copper deficiency. Leaf streaking can be similar to Fe deficiency.

Copper deficiency made worse by

Organic soils
Calcareous soils
Sandy soils
Reclaimed heathland
High nitrogen applications

Copper is important for

Improves fertility
Good cob development
Improves yield
Brings harvest date forward

Yara recommended fertilizers for Copper

YaraVita® MANCOZIN™

Corn: 1 pint/acre at the 4 to 8 leaf stage. For moderate to severe deficiency repeat applications at 10 to 14 day intervals. Water rate: 3 to 20 gallons/acre.