pedonn.

Brit.

/ˈpɛdɒn/, U.S.

/ˈpɛdɑn/

Origin: Either (i) formed within English, by derivation. Or (ii) a borrowing from Greek. Etymons: pedo- comb. form², -on suffix¹; Greek πέδον.

Etymology: Either < pedo- comb. form² + -on suffix¹, or < ancient Greek πέδον ground, earth (see pedo- comb. form²).

Soil Science.

A notional column of soil that extends vertically from the surface to the underlying parent material and is of sufficient area (usually at least a square metre) to be representative of the surrounding soil and its horizons.

ΘΚΠ

the world > the earth > structure of the earth > constituent materials > earth or soil > [noun] > horizon > profile

profile1906

pedon1960

1960 Simonson & Gardiner in Trans. 7th Internat. Congr. Soil Sci. 4 128 Nature of the Pedon. It has recently been proposed that the term, pedon.., be used as a generic term for small basic soil entities. [Note] The term was proposed by Guy D. Smith.

1960 Simonson & Gardiner in Trans. 7th Internat. Congr. Soil Sci. 4 129 A pedon consists of a small volume of soil which includes the full solum and the upper part of the unconsolidated parent material.., is usually less than 2 meters in depth, and has a lateral cross section that is roughly circular or hexagonal in shape and between 1 and 10 square meters in size.

1973 L. M. Thompson & F. R. Troeh Soils & Soil Fertility (ed. 3) xvi. 369 Soils with large variations in their properties within short horizontal distances are allowed to have pedons as large as 10 sq m..so that their properties may be fully represented.

2003 Austral. Jrnl. Soil Res. (Nexis) 41 37 The clay mineralogy of the iron nodule distribution was essentially uniform through the whole pedon.

This entry has been updated (OED Third Edition, September 2005; most recently modified version published online March 2022).

单词	pedon
释义	pedonn. Brit. /ˈpɛdɒn/, U.S. /ˈpɛdɑn/ Origin: Either (i) formed within English, by derivation. Or (ii) a borrowing from Greek. Etymons: pedo- comb. form², -on suffix¹; Greek πέδον. Etymology: Either < pedo- comb. form² + -on suffix¹, or < ancient Greek πέδον ground, earth (see pedo- comb. form²). Soil Science. A notional column of soil that extends vertically from the surface to the underlying parent material and is of sufficient area (usually at least a square metre) to be representative of the surrounding soil and its horizons. ΘΚΠ the world > the earth > structure of the earth > constituent materials > earth or soil > [noun] > horizon > profile profile1906 pedon1960 1960 Simonson & Gardiner in Trans. 7th Internat. Congr. Soil Sci. 4 128 Nature of the Pedon. It has recently been proposed that the term, pedon.., be used as a generic term for small basic soil entities. [Note] The term was proposed by Guy D. Smith. 1960 Simonson & Gardiner in Trans. 7th Internat. Congr. Soil Sci. 4 129 A pedon consists of a small volume of soil which includes the full solum and the upper part of the unconsolidated parent material.., is usually less than 2 meters in depth, and has a lateral cross section that is roughly circular or hexagonal in shape and between 1 and 10 square meters in size. 1973 L. M. Thompson & F. R. Troeh Soils & Soil Fertility (ed. 3) xvi. 369 Soils with large variations in their properties within short horizontal distances are allowed to have pedons as large as 10 sq m..so that their properties may be fully represented. 2003 Austral. Jrnl. Soil Res. (Nexis) 41 37 The clay mineralogy of the iron nodule distribution was essentially uniform through the whole pedon. This entry has been updated (OED Third Edition, September 2005; most recently modified version published online March 2022). < n.1960
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