pennsylvania state soil and water conservation commission

United States. Soil Conservation Service, Pennsylvania State College. Agricultural Experiment Station, Pennsylvania. State Soil and Water Conservation Commission · U.S. Dept. of Agriculture, Soil Conservation Service

76 sayfa · 1986

Soil surveys / Soils / Maps

Garland H. Lipscomb, United States. Soil Conservation Service, Pennsylvania State University. Agricultural Experiment Station, Pennsylvania State University. Agricultural Extension Service, Pennsylvania. State Soil and Water Conservation Commission · USDA, SCS

102 sayfa · 1970

Soils / Maps

Donald B. Holzer, Edward H. Sautter, Samuel A. Browning, Lackawanna County Planning Commission, United States. Soil Conservation Service, Pennsylvania State University. College of Agriculture, Pennsylvania. State Soil and Water Conservation Commission · United States Department of Agriculture, Soil Conservation Service

137 sayfa · 1971

Soils / Soil surveys