Sixth-7th ed. by H. O. Buckman and N. C. Brady.

the soil in perspective;
supply and availability of plant nutrients in mineral soils;
some important physical properties of mineral soils;
soil colloids: their nature and practical significance;
organisms of the soils;
organic matter of mineral soils;
soil water: characteristics and behavior;
vapor losses of soil moisture and their regulation;
liquid losses of soil water and their control;
soil air and soil temperature;
origin, nature and classification of parent materials;
soil formation, classification and survey;
organic soils (histosols): their nature, properties and utilization;
soil reaction: acidity and alkalinity;
lime and its soil - plant relationships;
nitrogen and sulfur economy of soils;
supply and availability of phosphorus and potassium;
micronutrient elements;
fertilizers and fertilizer management;
animal manures and green manures;
soils and chemical pollution;
soils and the word's food supply