Soil and Other Earth Material Kinds of Soils

Soil and Other Earth Material

Kinds of Soils What are the kinds soils?

Loamy Soil • • • Pierie Soil / Grass Soil Forest Soil Tropical Soil Organic Soil Desert Soil • • • Tunara Soil Sandy Soil Clay Soil Chalky Soil Peaty Soil

By: Texture Colour Water Retention Classifying Soils How do we classify soils?

Texture Soil is made up of three types of particles – sand, silt and clay. The texture of a type of soil depends on the amount of sand, silt and clay present in it

Colour Different types of soils have different colours. Soil may be light or dark. The colour of a type of soil depends on the types of minerals present in the soil and weather it is fertile or not Soils that are yellow or red usually contain the mineral iron.

White soil indicates the presence of the mineral calcium. Dark – coloured soil usually has a higher content of nutrients or dead plant and animal material. It is usually fertile. White soil Dark-coloured soil

Water Retention Soil water retention refers to the ability of a soil to hold on water. Let us compare the water retention of sand clay. Sand clay are placed in filter funnels lined with filter paper. Water is poured into the filterfunnels. The water that passes through the soil are collected using beakers.

Sand Movement of water Sand Filter Funnel Beaker Sand Particle Volume of water that flows through sand We can observe that more water passes through sand than clay. So, sand does not retain water as well. The spaces between sand particles are large. Thus water flows through sand quickly.

Clay Sand Movement of water Filter Funnel Beaker Volume of water that flows through sand We can observe that less water passes through clay than sand. So, clay retain water as well better than sand. The spaces between clay particles are small. Thus water does not flows through clay easily.

Uses of Soil What are the uses of soil?

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