Various species of ants engage in some kind of agriculture. Here, a leaf-cutter ant gathers food for its fungus farm. Mark Bowler/Science Source hide caption toggle caption Mark Bowler/Science Source The Salt Who Invented Agriculture First? It Sure Wasn't Humans November 25, 2016 Ants in Fiji farm plants and fertilize them with their poop. And they've been doing this for 3 million years, much longer than humans, who began experimenting with farming about 12,000 years ago.