With which substance should the tiny rock particles mix to form fertile soil ?

Answer

To answer the question of which substance should mix with tiny rock particles to form fertile soil, we can follow these steps:

### Step 1: Understand the Components of Soil
- Soil is made up of various components, including tiny rock particles, organic matter, air, and water. Each of these components plays a crucial role in the soil's fertility.

### Step 2: Identify the Role of Tiny Rock Particles
- Tiny rock particles are essential for soil structure. They help retain minerals and water, which are vital for plant growth. However, they are not sufficient alone to create fertile soil.

### Step 3: Define Fertile Soil
- Fertile soil is characterized by its ability to support healthy plant growth and yield high-quality crops. It contains the right balance of nutrients, moisture, and organic matter.

### Step 4: Introduce Humus
- Humus is a key component of fertile soil. It is formed from the decomposition of organic matter, such as dead plants and animals. Humus is rich in nutrients and helps improve soil structure, water retention, and nutrient availability.

### Step 5: Mix Tiny Rock Particles with Humus
- To create fertile soil, tiny rock particles should be mixed with humus. This combination enhances the soil's ability to support plant growth by providing essential nutrients and improving its overall structure.

### Conclusion
- Therefore, the substance that should mix with tiny rock particles to form fertile soil is **humus**.

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