Soil

By:Ava

Soil

Where dose soil come from? Soil is a blend of rock fragments watch air and humus that's carbon rich or organic materal left behind by living things. the humus makes the dirt more thiner and when it gets more thiner more animals can live there more often. What is in soil? Almost all plants need soil to grow. Soil must have important stuff in it. So plants must need minerals to grow. When things die they decompose and when they break down and turn into humus witch is thick and black. Plants get there food from the sun and the soil.

What are different layers of soil?

Topsoils on the surface, and its really dark. So there must be a lot of husmus. Below the topsoil is the subsoil layer. Its lighter, so there must be a lot of humus. And bedrock is really hard rock. There are different layers of soil. what are different kinds of soils? A soil in a forest is thick and black and has lots of humus. Its preatty damp, to. So the soil must hold a lot of water. Near a lake, the soil has a lot of sand in it. Its lighter than the forest soil, so it must have less humus in it. Farm soil looks different then the other soil.

Soil

Soil covers much of the land on earth. It is made up of minerals ( rock, sand, clay, slit), air, water, and organic matierl ( matter from dead plants and animals). Soil prvideds a substrate for plants ( roots achor in soil ), a source of food for plants, and a home for many animals ( inects like spiders, centipeeds, worms, burrowing , animals, bacteria, and many others).