Sand, silt, clay and organic matter will separate in different layers and at different speeds with the heaviest particles settling first. Ensure that you only use soil that is free from faeces ...

Avoid bare soil patches or empty flowerbeds by always having some plants growing. This is to protect the top layer from being blown away by the wind or washed away by the rain. Decide what items ...

A practical observation activity looking at soil in detail, with discussion points about soil contents and soil quality for plants and earthworms. Key Stage: KS2 Year 3 (ages 7-8) Time required: ...

Soil carbon storage is a vital ecosystem service, resulting from interactions of ecological processes. Human activities affecting these processes can lead to carbon loss or improved storage. Aa Aa ...

The next layer is the mantle. Many people think of this as lava, but it's actually rock. The rock is so hot, however, that it flows under pressure, like road tar. This creates very slow-moving ...

A worm burrows its way through the dark earth, ingesting particles of soil and expelling nutrient-rich casts in a constant forage for food. Charles Darwin described earthworms as one of the most ...

As the layer of fertile topsoil thins, it gets increasingly difficult to grow crops for food. Without altering agricultural practices and urgently finding ways to preserve soil, the global food ...

The most common abstraction layer is the programming interface (API) between an application and the operating system. High-level calls are made to the operating system, which executes the ...

Soil fertility is the ability of soil to sustain plant growth and optimize crop yield. This can be enhanced through organic and inorganic fertilizers to the soil. Nuclear techniques provide data that ...

Liquid Layers is a fun interactive site where you can engage with a sea of colorful fluid. I like that you can play around ...

The six senior diplomats Ottawa has ordered out of the country may not be the last Indian officials to be expelled as Canadian police investigate what they allege is the involvement of agents ...