Both corn and beans grow best in warm conditions and full sun. Corn is a heavy feeder and needs frequent nitrogen applications to produce full, heavy ears. Beans, on the other hand, can fix nitrogen in the soil and rarely need additional fertilizer. Corn depletes the soil of nutrients, while beans build the soil. Many gardeners plant beans in a garden location either immediately before or
immediately after planting corn there. Both beans and corn need consistent moisture.
(So yes it is a good idea!)
I think I heard that eLengo is launching a soil fertility and horticultural course over the phone in October with Eldoret University.....I am sure there will be lot of info in there....I am joining for sure