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Article
Corn leaf potassium deficiency symptoms
Integrated Crop Management News
  • John E. Sawyer, Iowa State University
  • Antonio P. Mallarino, Iowa State University
Document Type
Article
Publication Date
7-1-2002
Abstract

Potassium (K) leaf deficiency symptoms have recently appeared in some cornfields. Early-season symptoms typically show when corn begins rapid growth, calf to knee-high (V6-V8 growth stages), and the K uptake rate accelerates as plant demand responds to this rapid growth. Because K is maintained in the plant in the K+ ion form, it is readily moved from older tissue to the growth regions, hence deficiency symptoms appear on the older leaves. On corn, symptoms show as yellowing to necrosis of the leaf margins on older leaves.

Copyright Owner
Iowa State University
Language
en
File Format
application/pdf
Citation Information
John E. Sawyer and Antonio P. Mallarino. "Corn leaf potassium deficiency symptoms" (2002)
Available at: http://works.bepress.com/john-sawyer/54/