For the purpose of carrying out the provisions of this joint resolution on national-forest lands and other lands under the administration or control of the Forest Service of the Department of Agriculture, including the acquisition of land or interests therein for nurseries, there is authorized to be appropriated to remain available until December 31 of the ensuing fiscal year, $3,000,000 for the fiscal year ending June 30, 1951; $5,000,000 for the fiscal year ending June 30, 1952; $7,000,000 for the fiscal year ending June 30, 1953; $8,000,000 for the fiscal year ending June 30, 1954; $10,000,000 for the fiscal year ending June 30, 1955; a like amount for each subsequent year through the fiscal year ending June 30, 1965, and thereafter such amounts as may be needed for reforestation; and $1,500,000 for the fiscal year ending June 30, 1951; $1,750,000 for the fiscal year ending June 30, 1952; $2,000,000 for the fiscal year ending June 30, 1953; $2,500,000 for the fiscal year ending June 30, 1954; $3,000,000 for the fiscal year ending June 30, 1955; a like amount for each subsequent year through the fiscal year ending June 30, 1965, and thereafter such amounts as may be needed for range revegetation.