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Organic matter can correspond to non-living things such as humus or living beings that once decompose are a very important source of elements such as carbon, hydrogen, nitrogen, oxygen, phosphorus and iron, which are important nutrients. In addition, organic matter defines the PH of the soil, helps to retain liquids and even gives the color to soil

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Rocks and minerals form most of the soil either as sand, silt or clay, they have different compositions of previous rocks and include nutrients such as iron, potassium and calcium. The properties of these minerals help us classify soils and give them particular characteristics.
Clay soil example

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The percentage of water as well as the air depend on the porosity of the soil and are important for the nutrition of organisms and plants.

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Soils can have different compositions or amounts of air, the dynamics of this is related to soil organisms and even the amount of water.
The main components of air in soils are oxygen, nitrogen and carbon dioxide, wich tend to be similar to the athmosphere