{"data":{"id":"us-ca/prc-4528","jurisdiction":"us-ca","citation":"PRC § 4528","heading":"","body":"As used in this chapter:\n(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.\n(b) “Countable tree” means a tree that can be used in calculating the degree of stocking under the following criteria:\n(1) The tree must be in place at least two growing seasons.\n(2) The tree must be live and healthy.\n(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.\n(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.\n(c) “Stocking” means a measure of the degree to which space is occupied by well-distributed countable trees.\n(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.\n(e) “Fuel break” means a strip of modified fuel to provide a line from which to work in the control of fire.\n(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.","path":["Public Resources Code - PRC","DIVISION 4. FORESTS, FORESTRY AND RANGE AND FORAGE LANDS [4001. - 4958.]","PART 2. PROTECTION OF FOREST, RANGE AND FORAGE LANDS [4101. - 4789.7.]","CHAPTER 8. Z'berg-Nejedly Forest Practice Act of 1973 [4511. - 4630.2.]","ARTICLE 2. Definitions [4521. - 4529.5.]"],"source_url":"https://downloads.leginfo.legislature.ca.gov/pubinfo_2025.zip","current_through":"2026-09-13","vintage":"","retrieved_at":"2026-09-14T05:56:33Z","sha256":"d4978fb6f9cf87d0fae63ad0718ce1309cb26d749af95f80255e7b342c9095e4","source_id":"us-ca","stale":false,"prev":"us-ca/prc-4527.5","next":"us-ca/prc-4528.5"},"notice":"GroundRules: Original legal text. Not legal advice."}