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undefined nutrient problem in rice

Nutrient Deficiency or Toxicity?

Nutrient Deficiency or Toxicity? published on No Comments on Nutrient Deficiency or Toxicity?

The assortment of photographs shown here illustrate a problem local growers have termed “John Deere Disease”.  Don’t blame me, it was not my idea.  The bright yellow areas of the field in contrast to the dark green account for the colloquialism.  So what is causing it?  We do not know.  Tissue samples from last year showed the yellow plants were very high in sodium and low in manganeseMagnesium not manganese was higher in the yellow plants than the normal, but not excessive.  Dr. Harrell is aware of and is working on the problem too.  More tissue samples have been taken.  Maybe they will provide another clue.  The problem appears to be worse where water enters the field first.

Field view of undefined nutrient problem
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