First, the lightest soil component is clay. The, there's sand then humus then finally gravel.
25%-sand 255-clay 25%-gravel 25%-humus
topsoil
No the have little humus
yes
Desert soils contain a high percentage of sand and are low in organic material. This happens in areas where there are few plants that would provide the decayed leaves and other dead organic material called humus. Humus is rich in nutrients and is better able to hold water than sand.
no
Sand and humus.
Humus
Loam example is:soil,clay,sand,and humus.
Humus,sand,clay,and water
sand, clay, silt, and humus