What is a benefit of adding organic material to soil?

• A. It decreases microbial activity
• B. It improves nutrient availability
• C. It reduces soil aeration
• D. It promotes soil erosion

Answer: (B)

Adding organic material to soil significantly improves nutrient availability. Organic matter, such as compost, leaves, and manure, enhances soil health by increasing the soil's capacity to store nutrients and making them more accessible to plants. It contributes essential elements, such as nitrogen, phosphorus, and potassium, which are crucial for plant growth. Furthermore, the breakdown of organic material by microorganisms helps to release these nutrients in forms that are readily usable by plants.

In addition to increasing nutrient availability, organic material also improves soil structure and water retention, promotes microbial diversity, and encourages the formation of aggregates in soil, which are beneficial for root growth and overall plant health. These aspects collectively lead to healthier, more productive soil, making it an essential practice for successful gardening and agriculture.