section 18 natural resources this presents data on the area ownership production trade reserves and disposition of is defined here as including forestry fisheries mining mineral products timber resource com mercial timberland statistics cov ering national forests forest service cooperative programs product for lumber pulpwood woodpulp paper paperboard similar principal sources relating to are united states 1991 demand technology assess ment 2001 us consumption price land areas system issued annually by department agriculture agricul tural reports annual survey manufactures current industrial census bureau internet in print manufacturing pro files additional information published monthly business economic analysis wood pulp fiber american