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2.1 (Horizons)

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Total cards: 6•Content version: v4•Public deck•Updated: 8/1/2026

Card preview (6)

#1
Front (Question)

O Horizon

Back (Answer)

• Made up of Organic Material • Found at soil surface • where detritus is

#2
Front (Question)

A Horizon

Back (Answer)

• Often called “topsoil” • Made up of sand, silt, and clay particles • COWA: Contains Organic material, Water, and Air • Most Biologically Productive Layer

#3
Front (Question)

E Horizon

Back (Answer)

• Eluvation Layer made up of mostly large sand particles • Leaching of water and nutrients from A Horizon to B Horizon • Poor nutrients

#4
Front (Question)

B Horizon

Back (Answer)

• The “Subsoil” • composed of Metals such as Iron and Aluminium that oxide • reddish color

#5
Front (Question)

C Horizon

Back (Answer)

The crumbled (weathered rock material) parent material.

#6
Front (Question)

R Horizon

Back (Answer)

BEDROCK The parents material (volcanic ash, salt, glaciers) from the horizons form.