Eggshells as fertilizer in horticulture practices

Eggshells are a rich and sustainable source of calcium and other essential minerals that contribute to soil fertility and plant health. As a natural byproduct of the poultry industry and household waste, eggshells provide an eco-friendly and cost-effective alternative to synthetic fertilizers. This study explores the potential of eggshells as an organic soil amendment in horticultural practices, focusing on their nutrient composition, modes of application, and benefits in enhancing plant growth and soil quality. The high calcium carbonate (CaCO₃) content in eggshells plays a crucial role in preventing calcium deficiencies in plants, improving soil pH balance, and supporting root development. Additionally, the presence of trace elements such as magnesium, potassium, and phosphorus further enhances their agricultural value. By reviewing experimental findings and scientific equations related to calcium release and soil interactions, this paper aims to highlight the practical applications and advantages of eggshell-based fertilizers. The findings indicate that eggshells contribute significantly to plant growth, reduce soil acidity, and improve microbial activity, making them an essential component of sustainable horticultural practices.