Object

• urine: The final pH of urine should be below 3. It is essential to acidify the urine to prevent bacterial destruction of PD in urine.

• soil: As a guide, aim for between 4 - 5. The addition of pine needles or well rotted leaves will help to acidify soil.

• solution: This is why you don't acidify the solution with hydrochloric acid.

Modifying Another Word

• naturally: Another method is to allow the evening milk to acidify naturally and mix it with the fresh morning milk.