A bill to provide for consideration of the comparative productive potential of irrigable lands in determining nonexcess acreages under Federal reclamation laws.

Authorizes the Secretary of the Interior to establish the acreage of individually owned land which may eligibly receive project water as nonexcess acreage under Federal reclamation laws at 160 acres of class I land or the equivalent acreage of lands of lesser productive value as would be appropriate for an economic family-size farm. Requires the Secretary in establishing land classes to take into account factors including soil characteristics, crop adaptability, cost of crop production and soil characteristics.