Soils of the eastern United States and their use--

The nature and properties of soils

Thomas Lyttleton Lyon

Soils of the eastern United States and their use--

Jay Allan Bonsteel

The life of George Washington

Aaron Bancroft

The nature and property of soils

Nyle C. Brady

Soil and Environmental Analysis

Keith A. Smith

The nature and properties of soils

Harry Oliver Buckman

Soil conditions and plant growth

Edward J. Russell

Elements of agricultural chemistry

Sir Humphry Davy

Manual of soil laboratory testing

K. H. Head