A geography of Pennsylvania; containing an account of the history, geographical features, soil, climate ...

Mode of access: Internet.

Infiltration of water into the soil.

Mimeographed.

Reconnoissance soil survey of the middle San Joaquin Valley, California /

"Advance sheets--Field operations of the Bureau of Soils, 1916."

Essential elements and soil amendments for plants : sources and use for agriculture /

Mode of access: Internet.

Abstracts of recent published material on soil and water conservation.

Description based on: No. 4 (Nov. 1950); title from cover.

Soil survey of the Anaheim area, California /

Mode of access: Internet.

Manual of soil and water conservation engineering,

Mode of access: Internet.

Soil survey of the El Centro area, California /

Mode of access: Internet.

Soil survey of the Redding area, California /

At head of title: U.S. Department of Agriculture, Bureau of Soils.

Soil survey of the San Fernando Valley area, California /

U.S. Department of Agriculture, Bureau of Soils in cooperation with the University of California Agricultural Experiment Station.

Reconnoissance soil survey of the San Francisco Bay region,California /

Mode of access: Internet.

Soil survey of the Merced Area, California /

At head of title: Department of Agriculture, Bureau of Soils ... in cooperation with the University of California Agricultural Experiment Station.

Soil survey of the Colusa area, California /

At head of title: U.S. Department of Agriculture, Bureau of Soils.

Soil Survey of the Grass Valley area, California /

U.S. Department of Agriculture, Bureau of Soils in cooperation with the University of California Agricultural Experiment Station.

Reconnoissance soil survey of the lower San Joaquin Valley, California /

At head of title: U.S. Department of Agriculture, Bureau of Soils.