Introduction to the scientific study of the soil
631.4
T754I,5 Townsend, W. N.
Introduction to the scientific study of the soil
-- New York : St. Martin's , 1973
188419 vii, 209p.:ill.,tab.
Soils
Soil fertility
T754I,5 Townsend, W. N.
Introduction to the scientific study of the soil
-- New York : St. Martin's , 1973
188419 vii, 209p.:ill.,tab.
Soils
Soil fertility