“U.S. No. 1” consists of walnuts in shells which are dry, practically clean, bright and free from splits, injury by discoloration, and free from damage caused by broken shells, perforated shells, adhering hulls or other means. The kernels are well dried, free from decay, dark discoloration, rancidity, and free from damage caused by mold, shriveling, insects or other means. (See § 51.2954.)

(a) Kernel color shall be specified in connection with this grade in terms of “extra light,” “light,” “light amber,” or “amber” from the USDA Walnut Color Chart or in terms of “red” color. The color classifications in the USDA Walnut Color Chart shall not apply to “red” color. Furthermore, “red” color shall not be mixed with “extra light,” “light,” “light amber,” or “amber” colors. When kernel color is based on the color classifications from the USDA Walnut Color Chart, at least 70 percent, by count, of the walnuts have kernels which are not darker than “light amber,” and which are free from grade defects: Provided, That at least four-sevenths of the above amount, or 40 percent of the walnuts have kernels which are not darker than “light.” Higher percentages of nuts with kernels not darker than “light amber” which are free from grade defects and/or higher percentages with kernels not darker than “light” which are free from grade defects, may be specified in accordance with the facts. (See § 51.2954.)

(b) Size shall be specified in connection with the grade. (See § 51.2952.)

[29 FR 12865, Sept. 12, 1964. Redesignated at 42 FR 32514, June 27, 1977, and further redesignated at 46 FR 63203, Dec. 31, 1981, as amended at 82 FR 39657, Aug. 22, 2017]