We have information from several sources:
Nuts with Commercial Potential for America's Heartland
Exploration and Exploitation of New Fruit and Nut GermplasmMaxine M. Thompson
Magness, J.R., G.M. Markle, C.C. Compton. 1971. Food and feed crops of the United States.
Handbook of Energy CropsJames A. Duke. 1983. unpublished.
Walnuts, Juglans spp. University of Georgia
Walnut Crop Information University of California Davis
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Last modified: March 12 2013 by aw