
1) Dirt 2) Red soil 3) Reddish tropical soil 4) Soil
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https://www.crosswordclues.com/clue/laterite

Laterites are soil types rich in iron and aluminium, formed in hot and wet tropical areas. Nearly all laterites are rusty-red because of iron oxides. They develop by intensive and long-lasting weathering of the underlying parent rock. Tropical weathering (laterization) is a prolonged process of chemical weathering which produces a wide variety in ...
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http://en.wikipedia.org/wiki/Laterite

a red, porous, ferruginous rock
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http://florabase.dpaw.wa.gov.au/help/glossary

• (n.) An argillaceous sandstone, of a red color, and much seamed; -- found in India.
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http://thinkexist.com/dictionary/meaning/laterite/

Iron- and mineral-rich soil material, a layer of which is sometimes placed below a layer of gravel in the Substrate of Planted Tanks to provide plant nutrition.
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http://www.aquahobby.com/articles/e_glossary.php

soil layer that is rich in iron oxide and derived from a wide variety of rocks weathering under strongly oxidizing and leaching conditions. It forms ... [10 related articles]
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http://www.britannica.com/eb/a-z/l/20
Lat'er·ite noun [ Latin
later brick, tile: confer French
latérite .]
(Geol.) An argillaceous sandstone, of a red color, and much seamed; -- found in India.
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http://www.encyclo.co.uk/webster/L/17

A soil that is rich in oxides of iron and aluminum formed by deep weathering in tropical and subtropical areas.
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http://www.evcforum.net/WebPages/Glossary_Geology.html

Hard subsurface deposit of oxides of aluminum and iron found in tropical soils where the water table fluctuates with seasonal changes in precipitation.
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http://www.physicalgeography.net/physgeoglos/l.html

Laterite (named from the Latin later, meaning a brick or tile), is a red or brick-like mineral substance, sometimes forming a clay, found in various regions, especially in the Deccan and other parts of India, and in Sri Lanka.
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http://www.probertencyclopaedia.com/browse/HL.HTM

[
n] - a red soil produced by rock decay
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http://www.webdictionary.co.uk/definition.php?query=laterite
noun a red soil produced by rock decay; contains insoluble deposits of ferric and aluminum oxides
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https://www.encyclo.co.uk/local/20974

A highly weathered red soil rich in iron and aluminum oxides. Typically formed in a tropical to temperate climate where intense chemical weathering is common.
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https://www.encyclo.co.uk/local/22327

A residual soil found in tropical countries out of which the silica has been leached. May form ore bodies of iron, nickel, bauxite and manganese.
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https://www.encyclo.co.uk/local/22734

ubstance used in fresh water plant tanks to supply nutrients, either a powder placed under the gravel or chunks mixed in the gravel bed.
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https://www.encyclo.co.uk/local/23227
No exact match found.