7 CFR § 29.2530
Leaf structure
July 6, 2020
The cell development of a leaf as indicated by its porosity. (See chart, §29.2601.)
[37 FR 13626, July 12, 1972. Redesignated at 49 FR 16757, Apr. 20, 1984]
The cell development of a leaf as indicated by its porosity. (See chart, §29.2601.)
[37 FR 13626, July 12, 1972. Redesignated at 49 FR 16757, Apr. 20, 1984]