Page 19 - E-BOOK English
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Calcisols Retisols Acrisols Lixisols Alisols Luvisols Cambisols Arenosols Fluvisols Regosols
yes yes yes yes yes yes yes yes yes yes RSGs RSGs is not found in Thailand and may need further
Calcic or petrocalcic horizon no Retic properties no Argic horizon with <24, BS <50% CEC c no Argic horizon with <24 CEC c no Argic horizon with >60% >24, Al sat CEC c no Argic horizon with >24 CEC c no Cambic horizon no Coarse texture >100 cm no Fluvic materials no Other soils RSGs is not found in Thailand (6 RSGs) classification (8 RSGs)
Simplified Key to the Reference Soil Groups
23 24 25 26 27 28 29 30 31 32
Nitisols Ferralsols Planosols Stagnosols Chernozems Kastanozems Phaeozems Umbrisols Durisols Gypsisols
yes yes yes yes yes yes yes yes yes yes
Argic and nitic horizons no Ferralichorizon no Abrupt textural change no Stagnic properties no Chernic or blackish mollic horizon no horizon Brownish mollic and secondary CaCO 3 no horizon Mollic no Umbric horizon no Duric or petroduric horizon no or petrogypsic Gypsic horizon
13 14 15 16 17 18 19 20 21 22
Histosols Anthrosols Technosols Cryosols Leptosols Solonetz Vertisols Solonchaks Gleysols Andosols Podzols Plinthosols
yes yes yes yes yes yes yes yes yes yes yes yes
Organic matter >40 cm deep no Human modifications no Artefacts no horizon Cryic no Depth <25 cm no Natric horizon no horizon >35% clay vertic no Salic horizon no Gleyic properties no Andic and vitric horizons no horizon Spodic no Plinthite or petroplinthite within 25 cm
1 2 3 4 5 6 7 8 9 10 11 12
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