Please im having trouble on this last question help me please?

Question

Please im having trouble on this last question help me please?

Ok I have 24 questions the last one im having trouble this is the question one Why does the topsoil differ in thickness in different parts of Canada.? and Why is the size of rock particles important to soil structure?

Answer 1

Its worth checking it out on google or wikipedia

Answer 2

Size of Particles:

http://www.cnr.berkeley.edu/departments/...

The size of the different soil particles and their relative proportions have a great influence on the soil’s productivity. This is because the size of a particle determines how well it will hold on to water, other soil particles, and nutrients. These capabilities in turn affect the soil’s ability to grow plants.

The most productive soils have a medium texture, neither too coarse and loose nor too fine and tight. This texture provides a good rooting medium for plants and stores and releases chemicals and water to plant roots easily, facilitating good growth.