Organic soil
Gardeners build their soil with organic ingredients such as compost, worm castings, humus and mulch. This type of soil is loaded with organic materials (decaying remains of plants and animals).
In addition to the mineral composition of soil, humus (organic material) also plays a crucial role in soil characteristics and fertility for plant life.
The organic soil is mainly composed of organic matter in various stages of decomposition. The organic content of soil is widely variable, ranging from zero in some desert soils to almost 100%. This type of soil have an obvious absence of mineral soil particles.
As organic soil is being built, a positive working relationship develops between microorganisms, insects, plants and even the gardener maintaining the process.