7 CFR § 29.1030
Leaf structure
July 6, 2020
The cell development of a leaf as indicated by its porosity. (See Elements of Quality Chart.)
[42 FR 21092, Apr. 25, 1977. Redesignated at 49 FR 16755, Apr. 20, 1984, and 51 FR 25027, July 10, 1986]