In our guide, we will address two crucial elements for soil and plants: organic matter and humus, which significantly contribute to the health and vigor of land and plants. These substances enhance soil structure and provide essential nutrients to plants. In the next chapter, "Organic Matter and Humus," we will discuss key factors impacting field fertility. Humus, a byproduct of organic matter transformation, acts as an essential component for soil. Its presence fosters lush and healthy crops, underscoring the importance of agrotechnical treatments that promote humus formation in the soil.