Q- How did the Great Plains across the Mississippi river become a major wheat-producing area of America?
Answer- The main reasons behind Great Plains across the Mississippi river become a major wheat-producing area of America are:
1. In early time, people believed that the fertility of soil was exhausted after one time used for cultivation so people started in search of new field for cultivation. In this way migrants reached the Great Plains across the Mississippi river, they settled down in this region because there is a big river for irrigation purpose. So many people settled there and this made it a major wheat-producing area of America.