Why is organic matter important in soil?

Organic matter is crucial in soil because it significantly improves soil structure and enhances moisture retention. When organic matter is added to soil, it helps to create a crumbly texture that allows for better aeration and drainage while also promoting a balanced moisture level. This structure supports root growth and encourages the activity of beneficial soil organisms, which further contributes to soil health.

In addition to enhancing physical properties, organic matter also increases the soil's cation exchange capacity, allowing it to retain nutrients and making them more available for plants. The presence of organic matter can lead to a more robust and resilient ecosystem in the soil, which is vital for supporting healthy plant life.

The other options do not reflect the positive roles that organic matter plays in soil health, as it does not reduce pore space, decrease the ability of the soil to support plant life, or increase soil density in a beneficial manner. In contrast, organic matter serves to improve overall soil conditions, making it an essential component for productive land.