Soil can be quite different from one another due mainly to the different amounts of ___ they contain

Inorganic or Mineral Matter.

Explanation:

The mineral matter belongs to one of the physical components of the soil. It is about 45% of total volume of the soil. It contains nutrients like nitrogen, nitrogen, calcium, magnesium, iron etc. It holds water and can also hold air for plant use.

It serves as the home for soil organisms which may improve plant growth. Soil mineral also form the solid part of the soil, providing support for plants and also prevents leaching in soil erosion and evaporation of soil water.