What percentage of sandy soils is coated with organic matter?

The statement that over 70% of sandy soils is coated with organic matter highlights a key characteristic of soil composition and its interaction with organic materials. Sandy soils, known for their larger particle size and higher drainage capabilities, typically have a lower capacity for retaining nutrients and moisture compared to finer-textured soils such as clay. However, the presence of organic matter plays a critical role in enhancing their fertility and overall soil health.

When organic matter coats sandy soil particles, it improves the soil's structure, increases its moisture retention capabilities, and contributes to a more diverse and productive soil biota. This coating can lead to greater nutrient availability for plants, as organic matter acts as a reservoir for essential nutrients and improves the soil's ability to hold onto these nutrients against leaching.

The understanding of organic matter's impact on sandy soils allows for better agricultural and ecological practices, which is why it is significant that the figure is stated as over 70%. This level of organic matter indicates a well-managed sandy soil that maximally benefits from the input of organic materials, enhancing its physical and chemical properties for improved plant growth and soil sustainability.