The boards of chosen freeholders of the various counties of this state may appropriate for the purpose of farm demonstration work in their several counties such sums of money as shall seem to them just and proper to be expended in the counties making such appropriation by the county agricultural agent, under the supervision and direction of the director of the extension service.
Appropriations made by any county shall be used only in such county in addition to the funds appropriated by the state and in furtherance of the projects contemplated by sections 4:16-22 to 4:16-30 of this title.