Peanuts increase nitrogen and probably no nothing for micronutrients. They may allow time for the underlying rock to transfer minerals to the soil which are co

Peanuts increase nitrogen and probably no nothing for micronutrients. They may allow time for the underlying rock to transfer minerals to the soil which are consumed more heavily by the opposing crops, but they probably won't do anything for the issue reported in TFA. Having more corn doesn't mean that the corn or soil has more micronutrients. Corn is nitrogen heavy, so rotation makes sense if yields are all you care about.