Rice is a staple element in the Nigerian diet. In fact, Nigeria is the No. 1 consumer of rice in all of Africa.<br />But according to Business Insider, Nigerian farmers are worrying rice may become unaffordable for most of their countrymen.<br />Nigeria's economy has relied on oil for decades, but after prices fell, the government started investing in rice.<br />In August, Nigeria closed its borders to land imports. It was an effort to boost domestic rice production.