S O I L L AY E R S

T O P S O I L

ROOT

INSECTS

BACTERIA

FUNGI

T O P S O I L

CONTAINS

ROOT HUMUS DECOMPOSERS

WATER AIR INSECTS

S U B S O I L

S U B S O I L

CONTAINS

LESS WATER AND AIR

SMALL ROCKS LITTLE HUMUS

B E D R O C K

B E D R O C K

BIGGER ROCKS

CONTAINS

LITTLE WATER AND AIR

S O I L L AY E R S

T O P S O I L

B E D R O C K

S U B S O I L