👉 Nitrils are small, white, hard, and brittle crystals of calcium carbonate that grow in the surface of the soil. They play an important role in the formation of soil structure, which is essential for plant growth and fertility. The term "nitrils" refers to the calcium carbonate crystals that form on the surface of the soil. These crystals are small, white, hard, and brittle, and they grow in a specific pattern called "growth rings." The growth rings are often found on
