planosoln.

Brit.

/ˈpleɪnəsɒl/, U.S.

/ˈpleɪnəˌsɔl/,

/ˈpleɪnəˌsɑl/

Forms: also with capital initial.

Origin: Formed within English, by compounding. Etymons: plano- comb. form¹, -sol comb. form.

Etymology: < plano- comb. form¹ + -sol comb. form.

Soil Science.

An intrazonal soil having a thin, strongly leached surface horizon overlying a compacted hardpan or claypan, and occurring on flat uplands with poor drainage.

ΘΚΠ

the world > the earth > structure of the earth > constituent materials > earth or soil > kind of earth or soil > [noun] > other soils

white earth1448

Chiltern?1530

light land1589

deads1653

rosil1691

moorland1753

prairie soil1817

residuum1828

rendzina1905

podzol1908

solonetz1924

solod1925

solonchak1925

pedalfer1928

pedocal1928

skeletal soil1932

peloid1933

sierozem1934

planosol1938

lithosol1939

regosol1949

andosol1958

Alfisol1960

Aridisol1960

Histosol1960

Spodosol1960

Andisol1978

1938 M. Baldwin et al. in U.S. Dept. Agric. Yearbk. 991 The term ‘Planosol’ is being proposed to cover those soils with claypans and cemented hardpans not included with the Solonetz, Ground-Water Podzol, and Ground-Water Laterite. Families of Planosols correspond to associated normal zonal soils.

1965 B. T. Bunting Geogr. Soil xi. 133 Planosols are widespread on level plateau surfaces or broad gentle slopes on loess, till or wide alluvial terraces in central USA.

1972 C. B. Hunt Geol. Soils ix. 206 The comparatively thin modern soils on the surface of the old weathered deposits are Planosols with light-colored surface layers and deeper layers mottled brown and reddish brown.

1994 Plant & Soil 159 245 The vertical distribution of maize roots was studied in four contrasting soils, (arenosols, luvisols, planosols, and vertisols).

This entry has been updated (OED Third Edition, June 2006; most recently modified version published online March 2022).

单词	planosol
释义	planosoln. Brit. /ˈpleɪnəsɒl/, U.S. /ˈpleɪnəˌsɔl/, /ˈpleɪnəˌsɑl/ Forms: also with capital initial. Origin: Formed within English, by compounding. Etymons: plano- comb. form¹, -sol comb. form. Etymology: < plano- comb. form¹ + -sol comb. form. Soil Science. An intrazonal soil having a thin, strongly leached surface horizon overlying a compacted hardpan or claypan, and occurring on flat uplands with poor drainage. ΘΚΠ the world > the earth > structure of the earth > constituent materials > earth or soil > kind of earth or soil > [noun] > other soils white earth1448 Chiltern?1530 light land1589 deads1653 rosil1691 moorland1753 prairie soil1817 residuum1828 rendzina1905 podzol1908 solonetz1924 solod1925 solonchak1925 pedalfer1928 pedocal1928 skeletal soil1932 peloid1933 sierozem1934 planosol1938 lithosol1939 regosol1949 andosol1958 Alfisol1960 Aridisol1960 Histosol1960 Spodosol1960 Andisol1978 1938 M. Baldwin et al. in U.S. Dept. Agric. Yearbk. 991 The term ‘Planosol’ is being proposed to cover those soils with claypans and cemented hardpans not included with the Solonetz, Ground-Water Podzol, and Ground-Water Laterite. Families of Planosols correspond to associated normal zonal soils. 1965 B. T. Bunting Geogr. Soil xi. 133 Planosols are widespread on level plateau surfaces or broad gentle slopes on loess, till or wide alluvial terraces in central USA. 1972 C. B. Hunt Geol. Soils ix. 206 The comparatively thin modern soils on the surface of the old weathered deposits are Planosols with light-colored surface layers and deeper layers mottled brown and reddish brown. 1994 Plant & Soil 159 245 The vertical distribution of maize roots was studied in four contrasting soils, (arenosols, luvisols, planosols, and vertisols). This entry has been updated (OED Third Edition, June 2006; most recently modified version published online March 2022). < n.1938
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