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13 cards from this deck
Thin layer of natural material from weathered rock + decomposing organic matter
Up to 400 years
Mineral matter, air, water, organic matter
45%
5%
25%
Original rock from which soil develops
Dead plant material (leaves, twigs, stems) on ground
Dark substance from decomposed plant litter, rich in nutrients
In pores (spaces) between mineral particles
Dissolves & transports nutrients to plant roots
Up to 9,000 tonnes
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