Perennial Polyculture Farming
For three decades, the Land Institute has been working to create a sustainable system of agriculture that is patterned after nature itself, that is, in the words of Director Wes Jackson, “more resilient to human folly.”
The land Institute’s
The main problem farming with perennials is that they must devote more energy into building a larger root system and have less energy for growing seeds, thus have a lower food yield. Researchers at the Land Institute and several universities are searching for varieties of perennials whose yields can compete with annual crops. The Land Institute has had some success with wheat, sorghum, and sunflowers by cross breeding perennial strains with annual strains. Some lines of wheat have been developed that yield 70% of the best annual varieties.
Perennials are hardier than annuals and more resistant to weeds once they are established. In addition they contain stronger resistance to disease. A polycrop field, imitating the prairie, further increases resistance to disease since each type of plant is further separated making the spread of disease more difficult.
Designing farms in the image of nature would be a second agricultural revolution. Wes Jackson believes that the first agricultural revolution was the beginning of our estrangement from nature, and claims that, “It is fitting then that the healing of our culture begin with agriculture."A good write up on the Land Institute can be found in Biomimicry.