The boards of county commissioners of the counties of the State of Nevada are likewise authorized to enter into cooperative agreements with the representative of the State of Nevada appointed pursuant to the provisions of NRS 528.100 and with other counties, municipalities, organizations and individuals for the purpose of establishing a cooperative nursery or nurseries for production, arboretum and research purposes, and to appropriate and expend funds for all necessary expenses incurred in the planting and cultivation of conservation plant materials.