The+Force+Reference+Info


 * References** for soil values available here.

[|Here] is a reference with information about phosphates in soil, the **phosphorus cycle**, and other reference data.

[|Here] is a reference with information about nitrogen in soil, the **nitrogen cycle**, and other reference data.

[|Here] is a reference with information about potassium in soil, the **potassium cycle**, and other reference data.

[|Here] is a reference with information about **soil pH** and its impact on other soil nutrients.

Here is a link to [|Soil Science Basics] -- questions, answers and labs on soil.