Chemicals, humus, and the soil ; a simple presentation of contemporary knowledge and opinions about fertilizers, manures, and soil fertility.

Fertilizers and soil fertility /
by: Jones, Ulysses S.
Published: (1982)

Darwin on humus and the earthworm ; the formation of vegetable mould through the action of worms with observations on their habits /
by: Darwin, Charles, 1809-1882
Published: (1966)

Soil fertility, and fertilizers /
by: Tisdale, Samuel L.
Published: (1966)

Soil fertility and fertilizers /
by: Tisdale, Samuel L.
Published: (1975)

Humus and the farmer /
by: Sykes, Frank
Published: (1946)

An agricultural testament /
by: Howard, Albert, Sir, 1873-1947
Published: (1940)

Fertile soil : a grower's guide to organic & inorganic fertilizers /
by: Parnes, Robert
Published: (1990)

Soil fertility and fertilizers : an introduction to nutrient management /
Published: (2005)

Soils, crops, and fertilizer use : what, how, and why guide /
by: Leonard, David K., 1941-
Published: (1980)

Soil food : 1372 ways to add fertility to your soil /
by: French, Jackie
Published: (1995)

Soils and fertilizers for greenhouse and garden /
by: Laurie, Alex, 1892-1982, et al.
Published: (1946)

Soil fertility management for sustainable agriculture /
by: Prasad, Rajendra, 1936-
Published: (1997)

Soils and fertilizers for greenhouse and garden /
by: Laurie, Alex, 1892-1982
Published: (1948)

Managing soil fertility in the tropics : a resource guide for participatory learning and action research /
Published: (2000)

A student's book on soils and manures /
by: Russell, Edward J. (Edward John), 1872-1965
Published: (1915)

Organic materials and soil productivity /
Published: (1977)

Study week on organic matter and soil fertility. April 22-27, 1968.
Published: (1969)

Annual soil fertility report /

Soil fertility management in agroecosystems /
Published: (2016)

Environmental impact of fertilizer on soil and water /
Published: (2004)

Soil fertility and fertilizers /
by: Halligan, James Edward, 1879-
Published: (1912)

Fertilizers and fertilization : introduction and practical guide to crop fertilization /
by: Finck, Arnold
Published: (1982)

Theory and practice in the use of fertilizers /
by: Bear, Firman E. (Firman Edward), 1884-1967
Published: (1938)

Fertilizers for greenhouse and garden crops /
by: Laurie, Alex, 1892-1982
Published: (1929)

Theory and practice in the use of fertilizers /
by: Bear, Firman E. (Firman Edward), 1884-1967
Published: (1929)

Nongsa sihŏm yŏnʼgu nonmunjip. Research reports of the Rural Development Administration. Soil and fertilizer.
Published: (1992)

Alleviating soil fertility constraints to increased crop production in West Africa /
Published: (1991)

Soil fertility and organic matter as critical components of production systems : proceedings of a symposium /
Published: (1987)

The school of chemical manures ; or, Elementary principles in the use of fertilizing agents /
by: Ville, Georges, 1824-1897
Published: (1872)

Environmental impact of fertilizer on soil and water /
Published: (2004)

Soil Fertility and Fertilizer Management in Semiarid Tropical India : proceedings of a Colloquium, held at ICRISAT Center, Patancheru, India, October 10-11, 1988 /
Published: (1989)

Soil fertility decline in the tropics : with case studies on plantations /
by: Hartemink, Alfred E., 1964-
Published: (2003)

Fertilizers and manures /
by: Hall, A. Daniel, (Alfred Daniel), Sir, 1864-1942
Published: (1947)

Improving your garden through soil management.
by: Downey, Earl F.
Published: (1955)

Western fertilizer handbook /
Published: (1990)

Western fertilizer handbook /
Published: (1985)