Before you dig a garden, it's important to figure out what type of soil you have and then select plants (and amend your soil) ...

Sandy soil is pale coloured and has large particles. These create lots of small air gaps. Water drains through them easily so it usually feels dry. Clay soil is usually sticky and has small particles.

The most substantial of these are the lithic environments, where well-developed microbial communities have colonized cracks in rocks (these ... January 2002 stimulated soil diversity and microbial ...

Over millions of years, wind and water gradually weather rocks ... soil with good structure has lots of these clumps, called aggregates, which loosen heavy clay soil and help sandy soils hold ...