- Clay - has small particles, small air spaces and retains water better.
- Silt - is smooth and powdery.
- Sand - has large particles, large air spaces and thus drains quickly.
The ideal soil type is two part sand and silt to one part clay.
The best way to improve your soil type is to add organic matter (the best place to get them is your compost pile). Organic matter should be added on a yearly basis. The only limitation is how deep you can dig, how much you can afford to buy and how strong you are.