And as sunken skyscrapers add crumbled concrete to the new forest floor, the soil acidity plummets, potentially allowing new plant life to thrive.
当坍塌的摩天大楼为新森林地面添加破碎的混凝土时，土壤酸度会骤降，有可能让新的植物繁衍生息。
Soil acidity
原声例句
TED-Ed（视频版）
英语百科
Soil pH
（重定向自Soil acidity）
![Nutrient availability in relation to soil pH[5]](/uploads/202502/12/Soil-pH.svg5255.png)
The soil pH is a measure of the acidity or alkalinity in soils. pH is defined as the negative logarithm (base 10) of the activity of hydronium ions (H+ or, more precisely, H
3O+
aq) in a solution. In water, it normally ranges from -1 to 14, with 7 being neutral. A pH below 7 is acidic and above 7 is alkaline. Soil pH is considered a master variable in soils as it controls many chemical processes that take place. It specifically affects plant nutrient availability by controlling the chemical forms of the nutrient. The optimum pH range for most plants is between 5.5 and 7.0, however many plants have adapted to thrive at pH values outside this range.
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