What do you mean by soil quality? Isn't
dirt just dirt?
Soils don't just take up space, they do something -- many
things! They provide space and support for plants to grow, and places
for little creatures to live. A good quality garden soil only contains
about 50% solids. The rest is air, or pore space -- which allows plants
to spread their roots out. Plants are happiest when about half the pore
spaces have water in them. Good soils can hold water when it gets there
and then release it to the plants when they need it. Most of your
average plant is made of water, which comes mostly from the soil!
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