Cross-Section of Soil Layers
Palabras clave
dirtied,
cross section,
layer,
grass,
earth,
ground,
root,
green,
brown,
dark,
horizon,
texture,
structure,
top,
bottom,
surface,
underneath,
deep,
organic,
mineral,
clay,
sand,
silt,
humus,
nutrient,
biology,
ecology,
nature,
environment,
agriculture,
gardening,
science,
study,
growth,
life,
flora,
fauna