# Question: a surface soil in good condition for plant growth may...

###### Question details

- A surface soil in good condition for plant growth may have the following volume fractions: mineral matter 0.46, organic matter 0.04, soil water 0.1, and soil air 0.4. Assume the density of air is 1.3 kg m-3, the density of minerals is 2,700 kg m-3, the density of organic matter is 1,300 kg m-3, and the density of soil water is 1,000 kg m-3. Consider 1 m3 of this surface soil.

- a) What is the total volume fraction of the pores in this surface soil?
- b) What is the volume fraction of liquid phase required to saturate the soil?
- c) What is the mass of water required to saturate it?
- d) What is the mass of air in it when completely dry?
- e) What is the mass of the solid phase?
- f) What is the mass of the soil when it is saturated?
- g) What is the mass of wet soil when the volume fraction of liquid phase is only 0.25?