The activity of these organisms, the type of rock particles, the volume of organic matter, and the proportion of air and water all combine to create hundreds of different types of soil.

Then draw two vertical lines down so they join at a ... t very acidic and will support native plants that prefer this type of soil. Now, have kids explore the hole they dug out: • What can ...

The most prevalent clay-sized particles in soils fall into the class of layer-type aluminosilicates ... soil erosion to rates that exceed that of soil formation (Table 2). Erosion is often ...

We learned that chalk soil held the most water byobserving that less water filtered through the funnel than with theother two types of soil we tested. Investigations like this are greatfor helping ...

The relative proportions of all these, along with pH, determine soil type. The pH of a soil refers to its acidity or alkalinity and is a vital factor in plant growth. It's easy to measure and is ...