How is opal added to fertilizer?

Opal is added to fertilizer primarily as a source of silicon, which can enhance plant growth and improve resistance to stress. The incorporation of opal in fertilizers helps to increase soil fertility, promote root development, and enhance nutrient uptake. Additionally, silicon can improve the structural integrity of plants, making them more resilient to pests and diseases. Overall, opal serves as a beneficial component in certain specialized fertilizers aimed at optimizing plant health.