For the purpose of aiding each and any agricultural association formed under the provisions of this chapter within any county or counties in successfully carrying out the purposes for which it has been organized, which association may hold, within any county or counties comprising the agricultural district, a fair or exhibition, the boards of county commissioners of the several counties are authorized to appropriate any money or moneys out of the general fund of their respective counties to aid any such agricultural association composing any agricultural district of which the county or counties may be a part.