Nodules and Nitrogen Rates Peanut Notes No. 120 2023
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Collapse ▲Just to follow up on No. 119. I tend to be all in on correcting a nitrogen (N) deficiency. We did a considerable amount of work 10-15 years ago looking at peanut response to N rate. In that work, we found that peanuts need a great deal of N, just like corn. Of course getting the N through N fixation for $8-10 per acre is the best way. It just takes a lot of N, so my recommendation is 500 pounds AMS per acre. As you look at peanuts that might be struggling, keep in mind we need about 15 nodules on tap roots at about 45 days after planting to optimize yield. There is a gray area, but if I had 10 or less nodules I would consider applying N if the peanuts are yellow and the deficiency is N related.
In NC, we are racing against time when it comes to a N deficiency. We need to move the crop forward as quickly as we can once we see the N deficiency.