Yes, you can lower the pH of living soil without disturbing the microbiome to reduce excess nitrogen. However, it's important to adjust the pH gradually and regularly check the soil quality to ensure that beneficial microorganisms continue to thrive.
Here are some effective methods:
-Add organic materials: Compost, peat moss, or pine needles can slowly acidify the soil while supporting soil life.
-Sulfur-based soil amendments: Elemental sulfur or sulfate-based fertilizers (e.g., ammonium sulfate) can lower the pH over time without harming beneficial microbes.
-Acidifying fertilizers: Ammonium-containing fertilizers help to acidify the soil while providing nitrogen in a plant-available form.
-Mulching with acidic materials: Materials like pine bark or coffee grounds can slowly acidify the soil while maintaining microbial diversity.