Most of human kind
depends for food on cultivation—people's intervention in
nature to promote the growth of domestic plants —and animal husbandry.
Cultivation is a complex relation among human beings, their crops and
livestock, and the soil, climate, wild vegetation, and so on. The location of the
cultivation sites is therefore strongly under the direct influence of natural
conditions, especially of soil and climate; of social and cultural conditions
among people, and of their technical activities; of the biological character of the
crop or herd; and more particularly, of a complex interplay of all these elements.