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How does soil affect trees


The extent to which a soil can hold nutrients for the use of trees depends in part on the type of soil. If a soil is mainly composed of clay, it will have a high cation exchange capacity because the extremely small particles have more surface area collectively. When soil has a high cation exchange capacity, it is generally fertile. It is also good for a soil to have a large amount of organic material because it improves the exchange of nutrients. A sandy soil has a lower cation exchange capacity, and therefore must be fertilized more often. With regard to pH, a soils may be acidic, neutral, or alkaline. Most of the time, the soil beneath a tree is acidic because the tree absorbs a great deal of the alkaline exchange cations. Trees do well ina mildly acidic soil, such as a soil with a pH value between 5.5 and 7.

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