What two major crops are primarily grown in the Mississippi Alluvial Plain of Arkansas?

The Mississippi Alluvial Plain, known for its rich, fertile soil and favorable climate, is particularly conducive to the cultivation of rice and soybeans. Rice is a staple crop in Arkansas, benefiting from the region's abundant water resources and flat terrain, which make it ideal for flooded field cultivation. Soybeans are also widely planted due to their adaptability and the demand for oil and protein-rich food. The combination of these two crops reflects both the agricultural history and current farming practices in this region.

The other options involve crops that, while they may be grown in various parts of the country, do not reflect the primary agricultural output of the Mississippi Alluvial Plain in Arkansas.