Public Resources Code section 4528
(a)
“Basal area per acre” means the sum of the cross-sectional areas at breast height of the tree stems of commercial species per acre.(b)
“Countable tree” means a tree that can be used in calculating the degree of stocking under the following criteria:(1)
The tree must be in place at least two growing seasons.(2)
The tree must be live and healthy.(3)
The tree must have at least one-third of its length in live crown, except in pure stands of Douglas fir the tree must have at least one-fourth of its length in live crown.(4)
The tree must be a commercial species from a local seed source or a seed source which the registered professional forester determines will produce commercial trees physiologically suited for the area involved.(c)
“Stocking” means a measure of the degree to which space is occupied by well-distributed countable trees.(d)
“Site classification” means the classification of productive potential of timberland into one of five classes by board regulation, consistent with normally accepted forestry practices. Site I shall denote sites of highest productivity, site II and site III shall denote sites of intermediate productivity potential, and site IV and site V shall denote sites of lowest productivity potential.(e)
“Fuel break” means a strip of modified fuel to provide a line from which to work in the control of fire.(f)
“Stream” means a natural watercourse as designated by a solid line or dash and three dots symbol shown on the largest scale United States Geological Survey map most recently published.
Source:
Section 4528, https://leginfo.legislature.ca.gov/faces/codes_displaySection.xhtml?lawCode=PRC§ionNum=4528. (accessed Apr. 24, 2025).