Earthworms, underground farmers

Patricia Lauber

1976

Scaling soil nutrient balances

Food and Agriculture Organization of the United Nations

2004

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John Havlin, Samuel L. Tisdale, John L. Havlin et al.

2005

A classified list of fertilizer distributing machines and devices on the market, 1938

United States. Bureau of Agricultural Engineering

1938

Soil fertility and permanent agriculture

Cyril G. Hopkins

1910

Legumes used in soil improvement

United States. Extension Service. Office of Agricultural Instruction

1925

Agroforestry for soil management

Young, Anthony.

1997

Soil fertility

Henry Foth, H. D. Foth, Boyd Ellis

1996

Nutrient use in crop production

Zdenko Rengel

1998

Healthy Soils For Sustainable Gardens

Steve Buchanan

2009

Greenhouse evaluation of reclamation treatments for perlite-pumice mine spoils

1990

Microbiology of tropical soils and plant productivity

Y. R. Dommergues

1982

Soil fertility management in sub-Saharan Africa

W. Graeme Donovan

1998

Effects of lime, phosphorus, and other nutrients applied to tropical soils and a Florida spodosol on growth and mineral composition of forage legumes

Victor Manuel Urrutia R

1972

Soil fertility and fertilizers

James Edward Halligan

1912

New developments in fertilizer placement research

United States. Bureau of Agricultural Engineering

1936

Organic soil-fertility and weed management

Steve Gilman

2011

Larding the lean Earth

Steven Stoll

2002

Nitrogenous soil constituents and their bearing on soil fertility

Oswald Schreiner

1912

Soil fertility and fertilizers

Samuel L. Tisdale

1956

Terra preta

Ute Scheub

2016

Soil fungi and soil fertility

S. D. Garrett

1963

Soil testing

Brown, J. R.

1987

Fertilizers and soil fertility

Ulysses S. Jones

1979

Fragipan soils in the lower Mississippi River Valley: their distribution, characteristics, erodibility, productivity, and management

F.E. Rhoton

1996

The Ohio Valley covers up

United States. Soil Conservation Service

1938

Fertility of soils as affected by manures

Frank D. Gardner

1908

Soils and soil fertility

Louis M. Thompson

1973

The farmer of to-morrow

Frederick Irving Anderson

1913

Soils and soil fertility

A. R. Whitson

1912