Which materials can be used to create organic fertilizer?

The choice of animal manure, plant, and animal products as materials to create organic fertilizer is correct because these components are integral to the definition and function of organic fertilizers. Organic fertilizers are derived from natural sources, and they enrich the soil by providing essential nutrients while improving soil structure and increasing microbial activity.

Animal manure is particularly valuable; it contains nitrogen, phosphorus, and potassium, which are key nutrients for plant growth. Additionally, manure is rich in organic matter that helps enhance soil health. Plant materials, such as composted leaves or crop residues, contribute organic matter and nutrients, while animal products, such as bone meal, supply additional necessary minerals.

In contrast, synthetic chemicals and minerals, which are often found in conventional fertilizers, do not qualify as organic. While processed food waste can be composted and used in some organic fertilizer formulations, it is not inherently organic on its own without the context of how it is processed and what other materials it is combined with. Only using plant-based materials excludes valuable sources of nutrients, specifically from animal origins, which limits the effectiveness and balance of the organic fertilizer.