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Is fertilizer used for crops base or acid?

Fertilizers can be both acidic and basic (alkaline), depending on the type of fertilizer.

Here's a breakdown:

Acidifying Fertilizers:

* Ammonium-based fertilizers: Ammonium sulfate, ammonium nitrate, urea. These release hydrogen ions (H+) into the soil, making it more acidic.

* Elemental sulfur: This oxidizes to sulfuric acid, also lowering soil pH.

Basic (Alkaline) Fertilizers:

* Lime-based fertilizers: Calcium carbonate (limestone), calcium hydroxide (hydrated lime), calcium oxide (quicklime). These release hydroxide ions (OH-) into the soil, making it more alkaline.

* Nitrate-based fertilizers: Calcium nitrate, potassium nitrate.

Neutral Fertilizers:

* Phosphate-based fertilizers: Monoammonium phosphate (MAP), diammonium phosphate (DAP). These are generally considered neutral, though some may have a slight acidic effect.

Important Factors:

* Soil type: Different soil types have varying buffering capacities, meaning they resist changes in pH.

* Crop requirements: Some crops thrive in acidic soils, while others prefer alkaline conditions.

* Application rate: Over-application of acidifying fertilizers can significantly lower soil pH.

It's crucial to consider the specific fertilizer and its potential impact on your soil's pH. You can use soil tests to determine your soil's current pH and make informed decisions about fertilizer choices.

Note: Many fertilizers are a combination of different elements, and their overall impact on soil pH can be complex. Consulting with a local agricultural expert is recommended for specific advice on your situation.

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