Silt: Too Light.
• This is material
which is finer
Clay: Too Fine.
• Lots of clay makes
the soil heavy and
dense.
• The spaces between
soil particles are very
tiny.
• No air can get in from
the surface.
• Most bacteria and other soil organisms that need
oxygen can't breathe. But clay is important because it
can change the soil chemistry. Clays give off minerals
and absorb acids.