Page 15 - E-BOOK

ชั้นวินิจฉัย สมบัติ และวัสดุดิน ลักษณะที่ใกล้เคียงหรือเหมือนกันที่ใช้ท�งอนุกรมวิธ�นดิน

Gypsiric material** 5% or more gypsum
Histic horizon Histic epipedon

Hortic horizon Deep, P rich, anthropedogenic horizon

Hydragric horizon Redox features resulting from wet cultivation

Irragric horizon Light-coloured surface resulting from irrigation
Limnic material Limnic layer of coprogenous earth, diatomaceous earth and marl

Lithic discontinuity Lithologic discontinuity

Melanic horizon** Melanic epipedon

Mineral material Mineral material

Mollic horizon Mollic epipedon
Natric horizon Natric horizon

Nitic horizon Argillic horizon with shiny ped faces

Organic soil material Organic soil material
Permafrost** Permafrost

Petrocalcic horizon** Petrocalcic horizon

Petroduric horizon** Duripan

Petrogypsic horizon** Petrogypsic horizon

Petroplinthic horizon Petroferric contact
Pisoplinthic horizon 40% or more of hardened pisolitic laterite or ironstone

Plaggic horizon** Plaggen epipedon

Plinthic horizon Plinthite

Pretic horizon** -
Protocalcic properties** Petrocalcic horizon

Protovertic horizon Low prominent of shrink-swell cracks, slickensides or wedge-shaped peds

Reducing conditions Aquic conditions

Retic properties Interfingering of albic materials
Salic horizon Salic horizon

Secondary carbonates Identifiable secondary carbonates

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