That the state of New Mexico will cooperate with the bureau of biological survey of the United States, department of agriculture, in destroying predatory wild animals and rodent pests in the interest of the protection of crops and livestock and the improvement of range conditions. The work of destroying such predatory wild animals and rodent pests [is] to be carried on under the direction of the bureau of biological survey. There is hereby appropriated for the eighth fiscal year and each year thereafter until otherwise provided by law, the sum of twenty-five thousand dollars [($25,000)] for paying the state’s share of the cost of such operations as may be provided in the cooperative agreement hereinafter mentioned: provided, that not less than twenty-five thousand dollars [($25,000)] be furnished for such cooperative operations each year by the federal government.