Tlo
Tlo (zemljište) je rahli površinski dio Zemljine kore u što ubrajamo: prah, glinu, pijesak, šljunak, mješavine pijeska, šljunka i praha, pa čak i glina.
Tlo nastaje mehaničkim trošenjem svih vrsta stijena.
Ovisno o vrsti tla, ono može povećavati svoj volumen ili ga smanjivati (ovisno o postotku vode koju sadrži). Tlo je nehomogeno i znatno je deformabilnije (stišljivije) od stijena.
Tla prema vrsti dijelimo na:
- koherentna tla – to su vezana tla: prah, glina, organsko tlo
- nekoherentna tla – nevezana tla: šljunak, pijesak i njihove mješavine
U tlo neki svrstavaju još i treset (tj. ugljen, koji se najčešće nalazi u šljuncima, između proslojaka).
Znanost o tlu u građevinarskom smislu može se podjeliti prema područjima izučavanja na dva glavna dijela: mehanika tla i statika tla.
Grana geologije koja se bavi proučavanjem tala zove se pedologija.
- Soil Survey Staff. (1975) Soil Taxonomy: A basic system of soil classification for making and interpreting soil surveys. USDA-SCS Agric. Handb. 436. U.S. Gov. Print. Office. Washington, DC.
- Soil Survey Division Staff. (1993) Soil survey manual. Soil Conservation Service. U.S. Department of Agriculture Handbook 18.
- Logan, W. B., Dirt: The ecstatic skin of the earth. 1995 ISBN 1-57322-004-3
- Faulkner, William. Plowman's Folly. New York, Grosset & Dunlap. 1943. ISBN 0-933280-51-3
- Jenny, Hans, Factors of Soil Formation: A System of Quantitative Pedology 1941
- Why Study Soils? Arhivirano 2018-02-09 na Wayback Machine-u
- Soil notes
- „97 Flood”. USGS. Arhivirano iz originala na datum 2008-06-24. Pristupljeno 31. 05. 2006. Photographs of sand boils.
- Oregon State University's Soils Arhivirano 2006-08-28 na Wayback Machine-u (wiki)
- OpenAg.info's Soil Science Encyclopedia Arhivirano 2007-10-12 na Wayback Machine-u (wiki)
- European Soil Portal EUSOILS (wiki)
- Soil-Net.com A free schools-age educational site teaching about soil and its importance.
- Soilscapes Viewer a free online viewer of the soils of England and Wales and soils data source.
- Wossac the world soil survey archive and catalogue.
- Geo-technological Research Paper, IIT Kanpur, Dr P P Vitkar - Strip footing on weak clay stabilized with a granular pile http://pubs.nrc-cnrc.gc.ca/cgi-bin/rp/rp2_abst_e?cgj_t78-066_15_ns_nf_cgj4-78[mrtav link]