"Ant farmers boost plant nutrition with their feces, offering clues for future food security": https://www.sciencedaily.com/releases/2019/06/190624204755.htm
Humans began cultivating crops about 12,000 years ago. Ants have been at it rather longer. Leafcutter ants, the best-known insect farmers, belong to a lineage of insects that have been running fungus farms based on chopped-up vegetable matter for over 50 million years. The ant farming of flowering plants, however, started more recently, about 3 million years ago in the Fiji Islands.