Question

why is compost acidic ?

Answer 1

Explanation:

Sincecompostcan be either slightly alkaline or slightlyacidic, it is just as likely to reduce acidity as increase it. Adding a soil amendment that has a pH of around 7 will not affect the soilpH. ... In some alkaline or acidic soil, compostcan absorb enough ions to move the pH closer to neutral.

Answer 2

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As the compost is being made it goes through pH swings. In the initial stages, organic acids are formed and these make the compost pile more acidic—the pH drops. In these acidicconditions fungi grow better than bacteria and they take over the pile and start to decompose the lignin and cellulose in plants.