Pine trees slightly prefer slightly acidic soil. What happens if the pH changes to above 7?

It means the soil is basic.

Explanation:

The pH scale lies between 0 and 14. The following can be concluded depending on the pH value.

1. If the pH is between 0 and 6, it means it is acidic.

2. If the pH is 7, it means it is neutral.

3. If the pH is between 8 and 14, it means it is basic/alkaline

From the question, we were told that the pH of the soil is above 7. Therefore, the soil is basic.

The trees' growth might be affected

Explanation:

A pH above 7 indicates that the soil is no more acidic and that it had turned basic or alkaline in nature. This may affect the functioning of enzymes as this value is very far from optimum pH value. Thus growth is affected.