Sharpe, Ralph H. Department of Fruit Crops, University of Florida, Gainesville, Florida.
Toledo, Romeo T. Department of Food Science and Technology, University of Georgia, Athens, Georgia.
Last reviewed:August 2019
- Related Primary Literature
- Additional Reading
A large deciduous hickory tree [Carya illinoensis (alternatively C. illinoiensis or C. illinoinensis)], and the edible, oblong, thin-shelled nut from this tree. The pecan tree belongs to the family Juglandaceae (order Fagales; alternatively Juglandales in some classifications). It is native to valleys of the Mississippi River and tributaries as far north as Iowa, as well as to other streams of Texas, Oklahoma, and northern and central Mexico. This nut tree has become commercially important throughout the southern and southwestern United States and northern Mexico. Plantings have been made in other regions as well, including such diverse areas as Arizona, California, South Africa, Israel, Brazil, Australia, and Peru. The tree's major importance is in areas with a long growing season of more than 200 days and midsummer average temperatures of 26°C (79°F) or higher, although a few early ripening cultivars (horticultural varieties) are grown in slightly cooler regions. There are different cultivars for arid, irrigated regions and humid, summer regions. Cultivars in the United States have an indistinct winter chilling requirement, but they fruit best where the coldest winter temperatures average less than 16°C (61°F). See also: Fagales; Hickory; Horticultural crops; Juglandales
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 46 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