The Caúna farm works with polycultures. They are considered the basic model of future organic farming. Noble wood and fruit trees are combined with plantations of corn, manioc, tomatoes and other crops, but also vegetable and salad beds in rows and pyramids. The soil is covered with layers of organic material. Such agroforests ensure healthy, high-quality production. They are more labour-intensive, but much more sustainable than industrial agriculture. They also regenerate the soils leached by sugar cane.