Several minerals can be used as adsorbents for fertilizers to improve their efficiency and reduce nutrient leaching. These minerals have the ability to adsorb and release nutrients gradually over time, which can enhance plant uptake and minimize environmental impacts. Some common minerals used as adsorbents for fertilizers include:


Zeolites are crystalline minerals with a porous structure that can trap and release nutrients like ammonium, potassium, and calcium. They are particularly effective in retaining ammonium ions and releasing them slowly to plants.



Bentonite is a clay mineral known for its swelling properties and high CEC. It can be used to improve soil structure and retain nutrients like ammonium and potassium.


Various clay minerals, such as montmorillonite, kaolinite, and illite, can adsorb nutrients through their negatively charged surfaces. These minerals have a high cation exchange capacity (CEC), allowing them to hold onto positively charged ions like potassium, calcium, and magnesium.


Limestone and other calcium-rich minerals can be used to reduce soil acidity (raise pH) and provide a slow-release source of calcium. This helps to improve nutrient availability and enhance soil structure.

It's important to note that the effectiveness of these minerals as adsorbents can vary based on factors like soil type, climate, and the specific nutrient needs of the crops being grown. Their proper application requires a good understanding of local conditions and plant requirements.

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