The raising of two or more species in the same aquaculture system. It may involve animals, plants, or plants and animals together. One example would be that of rearing of fish within rice paddies, a common type of polyculture practiced in China. The fish keep mollusks and insects in check - these organisms can cause damage to the rice. The fish can also stir up soil nutrients and make them available to the plants.
Growing crops in an integrated setting. A variety of products may be grown in the same area in a complementary fashion that may increase biodiversity and give additional sources of income and food to the farmers. This is a traditional approach to agriculture in most coffee-producing regions.
Polyculture is agriculture using multiple crops in the same space, in imitation of the diversity of natural ecosystems, and avoiding large stands of single crops, or monoculture. It includes crop rotation, multi-cropping, intercropping, companion planting, beneficial weeds, and alley cropping.