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In page Africa (Roman province):

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The prosperity of most towns depended on agriculture. Described as the "granary of the empire", it was said that Africa fed the Roman populace for eight months of the year, while Egypt provided the remaining four months' supply.[1][2] Northwest Africa, according to one estimate, produced one million tons of cereals each year[citation needed], one-quarter of which was exported. Additional crops included beans, figs, grapes, and other fruits. By the 2nd century BC, olive oil rivaled cereals as an export item[citation needed]. Principal production and export goods included textiles, marble, wine, timber, livestock, pottery (such as African Red Slip), and wool, as well as enslaved people, and the capture and transporting of exotic wild animals.