Question:

What caused this?

Jordan:

Looks like manganese deficiency. I had a post a few weeks ago on it with photos.

Could also be early expression of boron toxicity or rapid growth after rains.

Follow up:

So, it’s in a low spot in the field. Couple spots. Majority of the field looks green and fine. What would you recommend based on this peanut tissue sample? (Note that the tissue sample had low levels of nitrogen, sulfur, and phosphorus. There was also elevated zinc. I did not include the actual report because it had the farmer's name on it.)

Jordan:

I think when we dry up some, the roots will get back going and so will the bacteria that fixes N. The report suggested zinc might be an issue. Might want to check soil levels. If it is zinc, peanuts will not get much better even as soil dries. If it is not zinc (any chance there was an issue before we got wet), peanuts will get back going. No magic bullet. Peanuts in many fields need drier soil and sunlight and not more fertilizer.