In general, there are three main types of soil after the word soil add the word notably, sand, clay and silt soil.

(i) Sandy soil

• contains large soil particles.
• particles packed loosely together.
• particles have greater air spaces and are well-aerated.

(ii) Clay Soil

• contains very small soil particles.
• particles are packed tightly together.
• particles have smaller air space and not well-aerated.

(iii) Silt Soil

• is smooth unlike clay soil which is sticky.
• drains more water unlike clay soil.
• retains more water unlike sand soil it.

(iv) Loam soil

• is a mixture of sand and clay particles
• contains remains of decayed organisms which form humus.

(v) Humus is

• composed of the remains of dead organisms and their waste products
• formed at the soil surface
• Used to improve the texture of soils.

For instance, if humus is added to clay soil, it improves aerations.