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13 cards from this deck
Vertical cross-section showing different soil layers/horizons
Individual layers within soil with unique characteristics
O, A, B, C, R
Organic material - plant debris, leaves, twigs
Topsoil
Rich in humus, dark colour, most fertile & biologically active
Nutrients washed away by heavy rainfall from A horizon
Subsoil
Area where minerals & nutrients collect from layers above
Dense, impermeable layer formed by mineral accumulation in B horizon
Parent material being broken down by weathering
Bedrock - solid rock at base of soil profile
Hundreds and thousands of years
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