Ex- 41

How iron ore is transported from the Mesabi ranges of Minnesota 26 across the Great Lakes to the steel mills of Gary, Pittsburgh, and Youngstown. 32, 41 The Land Must Eat U.S. Institute of Inter-American Affairs, 1947. Why increased use of barnyard manure, compost, green manure crops prepand crop rotation to replenish depleted and soil is necessary for good crops. Cross section of well-fertilized and neglected soils with seeds shows difference in