As used in this part:

1. (a) The term “agriculture” includes farming in all its branches, and, among other things, includes the cultivation and tillage of the soil, dairying, the production, cultivation, growing, and harvesting of any agricultural or horticultural commodities (including commodities defined as agricultural commodities in Section 1141j(g) of Title 12 of the United States Code), the raising of livestock, bees, furbearing animals, or poultry, and any practices (including any forestry or lumbering operations) performed by a farmer or on a farm as an incident to or in conjunction with such farming operations, including preparation for market and delivery to storage or to market or to carriers for transportation to market.

2. (b) The term “agricultural employee” or “employee” shall mean one engaged in agriculture, as such term is defined in subdivision (a). However, nothing in this subdivision shall be construed to include any person other than those employees excluded from the coverage of the National Labor Relations Act, as amended, as agricultural employees, pursuant to Section 2(3) of the Labor Management Relations Act (Section 152(3), Title 29, United States Code), and Section 3(f) of the Fair Labor Standards Act (Section 203(f), Title 29, United States Code).

   Further, nothing in this part shall apply, or be construed to apply, to any employee who performs work to be done at the site of the construction, alteration, painting, or repair of a building, structure, or other work (as these terms have been construed under Section 8(e) of the Labor Management Relations Act, 29 U.S.C. Sec. 158(e)) or logging or timber-clearing operations in initial preparation of land for farming, or who does land leveling or only land surveying for any of the above.

   As used in this subdivision, “land leveling” shall include only major land moving operations changing the contour of the land, but shall not include annual or seasonal tillage or preparation of land for cultivation.

3. (c) The term “agricultural employer” shall be liberally construed to include any person acting directly or indirectly in the interest of an employer in relation to an agricultural employee, any individual grower, corporate grower, cooperative grower, harvesting association, hiring association, land management group, any association of persons or cooperatives engaged in agriculture, and shall include any person who owns or leases or manages land used for agricultural purposes, but shall exclude any person supplying agricultural workers to an employer, any farm labor contractor as defined by Section 1682, and any person functioning in the capacity of a labor contractor. The employer engaging such labor contractor or person shall be deemed the employer for all purposes under this part.
4. (d) The term “person” shall mean one or more individuals, corporations, partnerships, limited liability companies, associations, legal representatives, trustees in bankruptcy, receivers, or any other legal entity, employer, or labor organization having an interest in the outcome of a proceeding under this part.
5. (e) The term “representatives” includes any individual or labor organization.
6. (f) The term “labor organization” means any organization of any kind, or any agency or employee representation committee or plan, in which employees participate and which exists, in whole or in part, for the purpose of dealing with employers concerning grievances, labor disputes, wages, rates of pay, hours of employment, or conditions of work for agricultural employees.
7. (g) The term “unfair labor practice” means any unfair labor practice specified in Chapter 4 (commencing with Section 1153) of this part.
8. (h) The term “labor dispute” includes any controversy concerning terms, tenure, or conditions of employment, or concerning the association or representation of persons in negotiating, fixing, maintaining, changing, or seeking to arrange terms or conditions of employment, regardless of whether the disputants stand in the proximate relation of employer and employee.
9. (i) The term “board” means Agricultural Labor Relations Board.
10. (j) The term “supervisor” means any individual having the authority, in the interest of the employer, to hire, transfer, suspend, lay off, recall, promote, discharge, assign, reward, or discipline other employees, or the responsibility to direct them, or to adjust their grievances, or effectively to recommend such action, if, in connection with the foregoing, the exercise of such authority is not of a merely routine or clerical nature, but requires the use of independent judgment.