So plants can grow and we can avoid a horrific death by starvation.
To keep your hands clean and to work with the soil. Your bare hands aren't strong enough to dig holes, aerate soil, amend soil and so forth.
Yuh need a keep clean so you are your not dirty dumbos
Fish need it for food, the soil needs it for clean-up, and plants need it for filtering soil.
a rock has to keep the soil clean
You can't!Plants NEED soil!
To keep it clean
For Healthy atmosphere and sorroundings you need to keep your class rooms clean.
to keep them warm and/or clean
yes it can clean its own soil.
yer i think so.
To keep your swimming pool clean you will need a filters and a water pump. A vacuum would as be a good idea.
Water, light, a fertile soil.