un it 10

Soil, vegetation and fauna

1.-Parts of the soil 2.-Types of soil

3.-Soil layers

The soil

Organic matter: this is made by the remains of living things. The descomposition of these remains creates humus

Inorganic matter: this is made by non living things

1.-Parts of the soil

2.-Types of soil2.-Types of soilThere are different types of soil There are different types of soil

according to the amount of humus an according to the amount of humus an water it has.water it has.

a) Fertile soilb) Poor soilc) Arid soil

a) Fertile soil• Soils with lots of humus and water are very

fertile

b) Poor soilSoils with little humus are poor and noot good

for cultivation.

c) Arid soil- Arid soils are dry and infertile- Arid soils are dry and infertile

3.-Soil layers3.-Soil layers

Topsoil: It is made up of water, sand and humus

Subsoil: It is made up of sand and rocks

Bedrock: It is made up of bigger rocks.

The soil and The soil and living thingsliving things

-Soil and vegetation -The soil and fauna

Soil and vegetationSoil and vegetation

- Plants benefit for the soil. The soil provides the water and nutrients plant need to grow

- The soil benefits from plants. Plants help make humus

The soil and faunaThe soil and fauna- Animals benefit from the soil. Some animals like worms and rabbits live inside the soil

- The soil benefits from animals. Animals create humus with their excrement.