Possibilities of shelterbelt planting in the plains region. A study of tree planting for protective and ameliorative purposes as recently begun in the shelterbelt zone of North and South Dakota, Nebraska, Kansas, Oklahoma, and Texas by the Forest service; together with information as to climate, soils, and other conditions affecting land use and tree growth in the region.

On cover: Issued under special allotment to the Plains shelterbelt project, U.S. Forest service.

Soils of Michigan /

"Issued in December 1940, as Circular bulletin 176 of the Michigan Agricultural Experiment Station, re-issued in June 1948, as Extension bulleten 290 of the Michigan State College Extension Service."

Field operations of the Bureau of Soils /

Report for each year issued in two volumes: text, and portfolio.

Principles and practice of agricultural analysis; a manual for the study of soils, fertilizers, and agricultural products; for the use of analysists, teachers, and students of agricultural chemistry.

v. 1. Soils. -v. 2. Fertilizers and insecticides. -v.3. Agricultural products.

Four young explorers; or, Sight-seeing in the tropics,

Mode of access: Internet.

Soils and men.

Folded col. map attached to back cover.

Mosquito investigations, Milk River irrigation project, Montana, with particular reference to causes of mosquito production in a long-established irrigated area characterized by flat topography and heavy soils.

Mode of access: Internet.

Tropical nature. An account of the most remarkable phenomena of life in the western tropics.

Mode of access: Internet.

Soil survey laboratory data and descriptions for some soils of Georgia, North Carolina, South Carolina /

"September 1967."

Soil survey laboratory data and descriptions for some soils of Illinois /

"April 1968."

Soil survey laboratory data and descriptions for some soils of Indiana /

Mode of access: Internet.

Soil survey laboratory data and descriptions for some soils of Wisconsin /

"September 1967."

Soil survey laboratory data and descriptions for some soils of North Dakota.

"August 1966."

Memoir on foundations in compressible soils, with experimental tests of pile-driving, and formula for resistance deduced therefrom.

"References to authorities cited": p. 3-4.

The progressive farmer : a scientific trestise on agricultural chemistry, the geology of agriculture; on plants, animals, manures, and soils. Applied to agriculture /

Mode of access: Internet.