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Claves para la Taxonomía de Suelos

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30<br />

United States Department of Agriculture, Natural Resources<br />

Conservation Service, National Soil Survey Center.<br />

Childs, C. W. 1981. Field Test for Ferrous Iron and<br />

Ferric-Organic Complexes (on Exchange Sites or in Water-<br />

Soluble Forms) in Soils. Austr. J. of Soil Res. 19: 175-180.<br />

Pons, L. J. and I. S.. Zonneveld. 1965. Soil Ripening and<br />

Soil C<strong>la</strong>ssification. Initial Soil Formation in Alluvial Deposits<br />

and a C<strong>la</strong>ssification of the Resulting Soils. Int. Inst. Land<br />

Rec<strong>la</strong>m. And Impr. Pub. 13. Wageningen, The Nether<strong>la</strong>nds.<br />

United States Department of Agriculture, Soil<br />

Conservation Service. 1975. Soil Taxonomy: A Basic System<br />

of Soil C<strong>la</strong>ssification for Making and Interpreting Soil<br />

Surveys. Soil Surv. Staff. U. S. Dep. Agric. Handb. 436.<br />

United States Department of Agriculture, Soil<br />

Conservation Service. 1993. Soil Survey Manual. Soil Surv.<br />

Div. Staff. U. S. Dep. Agric. Handb. 18.

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