spodicadj.

/ˈspɒdɪk/

Etymology: < Greek σποδός wood ashes, embers + -ic suffix.

Soil Science.

Of a soil horizon: that is an illuvial deposit rich in aluminium oxide and organic matter and usually also contains iron oxide.

ΘΚΠ

the world > the earth > structure of the earth > constituent materials > earth or soil > [adjective] > spec horizon

palaeosolic1956

andic1960

oxic1960

salic1960

spodic1960

1960 Soil Classification (7th Approximation) (U.S. Dept. Agric., Soil Survey Staff) v. 46/2 The spodic horizon is an illuvial accumulation of free sesquioxides accompanied by appreciable amounts of organic carbon, an illuvial accumulation of free iron not accompanied by roughly equivalent amounts of illuvial crystalline clay, or an illuvial accumulation of organic carbon usually if not always accompanied by an accumulation of aluminum combined in some form other than that of the crystalline silicate clays.

1972 J. G. Cruickshank Soil Geogr. iii. 91 Podsolisation involves the translocation downward or laterally of iron and aluminium compounds from silicate clays, and their concentration in a specific lower horizon (B₂, B_f, or spodic horizon).

1979 Nature 4 Oct. 366/2 Soils in this forest are histosols (peat soils) with some spodic (podzolic) characteristics.

This entry has not yet been fully updated (first published 1986; most recently modified version published online March 2018).

单词	spodic
释义	spodicadj. /ˈspɒdɪk/ Etymology: < Greek σποδός wood ashes, embers + -ic suffix. Soil Science. Of a soil horizon: that is an illuvial deposit rich in aluminium oxide and organic matter and usually also contains iron oxide. ΘΚΠ the world > the earth > structure of the earth > constituent materials > earth or soil > [adjective] > spec horizon palaeosolic1956 andic1960 oxic1960 salic1960 spodic1960 1960 Soil Classification (7th Approximation) (U.S. Dept. Agric., Soil Survey Staff) v. 46/2 The spodic horizon is an illuvial accumulation of free sesquioxides accompanied by appreciable amounts of organic carbon, an illuvial accumulation of free iron not accompanied by roughly equivalent amounts of illuvial crystalline clay, or an illuvial accumulation of organic carbon usually if not always accompanied by an accumulation of aluminum combined in some form other than that of the crystalline silicate clays. 1972 J. G. Cruickshank Soil Geogr. iii. 91 Podsolisation involves the translocation downward or laterally of iron and aluminium compounds from silicate clays, and their concentration in a specific lower horizon (B₂, B_f, or spodic horizon). 1979 Nature 4 Oct. 366/2 Soils in this forest are histosols (peat soils) with some spodic (podzolic) characteristics. This entry has not yet been fully updated (first published 1986; most recently modified version published online March 2018). < adj.1960
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