As used in Section 1201 et seq. of this title: (1) the term “forester” means a person who, by reason of his knowledge of the natural sciences, mathematics, and the principles of forestry, acquired by forestry education, as set forth in Section 1212 of this title, and/or practical experience is qualified to engage in the practice of professional forestry as hereinafter defined; (2) the term “registered forester” means a person who has been licensed pursuant to the act; (3) the term “practice of professional forestry” means professional forestry services, including but not limited to consultation, investigation, evaluation, planning, or responsible supervisions of any forestry activities when such professional services require the application of forestry principles and techniques; and (4) the term “Department” means the Oklahoma Department of Agriculture, Food, and Forestry.