The commission is hereby authorized, empowered and directed to formulate and submit to the Secretary of Agriculture, in conformity with the provisions of the Soil Conservation and Domestic Allotment Act, a state plan for each calendar year beginning with the year 1949. It shall be the purpose of each such plan to promote such utilization of land and such farming practices as the commission finds will tend, in conjunction with the operation of such other plans as may be approved for other states by the Secretary of Agriculture, to preserve and improve soil fertility, promote the economic use of land, diminish the exploitation and wasteful and unscientific use of natural soil resources, and reestablish and maintain the ratio between the purchasing power of the net income per person on farms and that of the income per person not on farms as defined in subsection (a) of Section 7 of the Soil Conservation and Domestic Allotment Act. Each such plan shall provide for adjustments in the utilization of land and in farming practices, through agreements with producers or through other voluntary methods, and for benefit payments in connection therewith, and also for such methods of administration not in conflict with any law of this state and such reports as the Secretary of Agriculture finds necessary for the effective administration of the plan and for ascertaining whether the plan is being carried out according to its terms.