spongy material rich in nutrients like nitrogen, phosphorus, magnesium, and calcium, all essential for plant growth. Earthworms and rain further distribute humus through the top layers of soil ...

Because of this, it only makes sense to provide your plants with the best soil if you want to grow a juicy tomato with a rich flavor! For a flavorful tomato, you will need loamy, humus-rich soil.

Soil organisms, like earthworms ... resulting in a layer of decaying leaves giving a rich humus. The deep roots of these trees reached down to the 'B' horizon, unlike with coniferous trees ...