Agriculture is the practice of cultivating the soil, planting, raising,
and harvesting both food and non-food crops, as well as livestock production.
Broader definitions also include forestry and aquaculture. Agriculture was a
key factor in the rise of sedentary human civilization, whereby farming of
domesticated plants and animals created food surpluses that enabled people to
live in the cities. While humans started gathering grains at least 105,000
years ago, nascent farmers only began planting them around 11,500 years ago.
Sheep, goats, pigs, and cattle were domesticated around 10,000 years ago.
Plants were independently cultivated in at least 11 regions of the world.