Final answer:
Wood ash, sulfur, and compost can help maintain an ideal pH in soil.
Step-by-step explanation:
Wood ash and sulfur can help maintain an ideal pH when added to soil. Wood ash has a high pH level and can raise the pH of acidic soil, while sulfur has a low pH level and can lower the pH of alkaline soil. Compost can also help regulate pH by providing a buffer against extreme changes in soil acidity or alkalinity.
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