Francis, Charles A. Department of Agronomy, Institute of Agriculture and Natural Resources, University of Nebraska, Lincoln, Nebraska.
- Efficient resource use
- Tropical cropping systems
- Temperate cropping systems
- Future of multiple cropping
- Additional Reading
Planting two or more species in the same field in the same year. This general term describes a multiplicity of systems that are as complex as agriculture itself. The first conscious planting by early people consisted of mixtures of cereals, grain legumes, roots, and tubers that were located near permanent dwellings. Perhaps this system of planting was patterned after the natural combinations of trees, shrubs, and other plants from which food was gathered in the wild, or resulted from the unintended growth that originated from seed contained in kitchen refuse that germinated and thrived in early fertile garbage dumps.
The content above is only an excerpt.
for your institution. Subscribe
To learn more about subscribing to AccessScience, or to request a no-risk trial of this award-winning scientific reference for your institution, fill in your information and a member of our Sales Team will contact you as soon as possible.
to your librarian. Recommend
Let your librarian know about the award-winning gateway to the most trustworthy and accurate scientific information.
AccessScience provides the most accurate and trustworthy scientific information available.
Recognized as an award-winning gateway to scientific knowledge, AccessScience is an amazing online resource that contains high-quality reference material written specifically for students. Contributors include more than 10,000 highly qualified scientists and 45 Nobel Prize winners.
MORE THAN 8700 articles covering all major scientific disciplines and encompassing the McGraw-Hill Encyclopedia of Science & Technology and McGraw-Hill Yearbook of Science & Technology
115,000-PLUS definitions from the McGraw-Hill Dictionary of Scientific and Technical Terms
3000 biographies of notable scientific figures
MORE THAN 19,000 downloadable images and animations illustrating key topics
ENGAGING VIDEOS highlighting the life and work of award-winning scientists
SUGGESTIONS FOR FURTHER STUDY and additional readings to guide students to deeper understanding and research
LINKS TO CITABLE LITERATURE help students expand their knowledge using primary sources of information