Necrosis in potatoes is caused by growing potatoes over and over again on the same field. That's wrong because you have to change the field for the potatoes each year. Each plant species is using different minerals, so if you want a good crop: change every year their fields. And don't put the species on the same field over a period of 4 years.

Yep, Indiana always rotate corn and beans. Makes sense

This us true. Otherwise, the plants withdraw all the minerals in the ground 👊🏻