Results 381 to 390 of about 6,310,741 (415)

Soil genesis, soil classification and soil survey

Geoderma, 1970
Abstract Mutual relationships exist between soil genesis, soil classification and soil survey. The first two subjects are dealt with separately. Some of the general lines in soil genetic investigation are traced. Next trends in soil classification are dealt with.
openaire   +2 more sources

Environmental Soil Chemistry

, 1995
Environmental Soil Chemistry: An Overview: Evolution of Soil Chemistry. The Modern Environmental Movement. Contaminants in Waters and Soils. Case Study of Pollution of Soils and Waters. Soil Decontamination.
D. Sparks
semanticscholar   +1 more source

Soil Classification and Soil Research

2002
Since the middle of the 20th century, society has been generous in funding research, and this was a period when almost every field of scientific endeavor saw great advances. The development of new research techniques and technologies greatly boosted research outputs during this period.
Winfried E. H. Blum, Michiel C. Laker
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Methods of soil analysis

American Potato Journal, 2015
A. Klute, Dwayne R. Buxton editor-in-chief Asa publications, John J. Mortvedt. editor-in-chief Sssa publications   +2 more
semanticscholar   +1 more source

Major Soil Type, Soil Classification, and Soil Maps

2017
Soil is a mixture of minerals, organic matter, gases, liquids, and some microorganisms. This chapter encompasses the major soil types in Malaysia and their classification. Generally, there are three main soil groups in Malaysia: residual soils of granite, residual soils of sedimentary rock, and coastal alluvial soils. Residual soils are formed from the
Safiah Yusmah Mohd Yusoff, Aminaton Marto   +1 more
openaire   +2 more sources

Soil data for crop-soil models

1993
Systems approaches for agricultural development can be realized at different levels of detail which are associated with different data needs. For soils five levels were defined, ranging from farmer’s knowledge and expert systems to use of complex simulation models.
Bouma, J., Wopereis, M.C.S., Wösten, J.H.M., Stein, A.   +3 more
openaire   +4 more sources

Soil Biology: Soil Microflora and Soil Acidity

1994
The low content of inorganic nutrients in forest soils makes the microbial activities in this ecosystem an important factor in regulating the amounts of available nutrients for the growth of trees. In such soils most of the fine roots of forest trees will be in an intimate symbiotic association with the mycelia of different fungi, thus greatly ...
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AN EXAMINATION OF THE DEGTJAREFF METHOD FOR DETERMINING SOIL ORGANIC MATTER, AND A PROPOSED MODIFICATION OF THE CHROMIC ACID TITRATION METHOD

, 1934
A. Walkley, I. A. Black
semanticscholar   +1 more source

Soil Resources and Soil Degradation

2012
Including rocky surfaces, deserts, and ice-covered areas, there is 130,575,894 km2 land area in the globe. About 38.5 million km2 (29.45 % of the earth’s ice-free land surface) is too dry for human habitation, and about 20.2 million km2 (15.46 %) of the land occuring in the cold tundra zone is not much suitable for normal agriculture.
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Methods of soil analysis. Part 2. Chemical and microbiological properties.

, 1982
A. Page
semanticscholar   +1 more source