Regarding the Ivanhoe and Chandler Walnut Varieties - AG INFORMATION NETWORK OF THE WEST
Bob Beede is a UCANR Farm Advisor, Emeritus Kings County, and consults with Tree Growers. He comments on the Ivanhoe variety, which is less likely to become rancid in poor storage. He also comments on Chandler, the top variety in the industry.
Source: aginfo.net