topsoil is held Together by the __ of the trees and plant . (roots/altitude)
Answers
Topsoil is held together by the roots of the trees and plant.
ROOTS
ADDITIONAL INFORMATION:
Topsoil is the upper, outermost layer of soil, usually the top 5–10 inches (13–25 cm). It has the highest concentration of organic matter and microorganisms and is where most of the Earth's biological soil activity occurs. Topsoil is composed of mineral particles, organic matter, water, and air. Organic matter varies in quantity on different soils. The strength of soil structure decreases with the presence of organic matter, creating weak bearing capacities. Organic matter condenses and settles in different ways under certain conditions, such as roadbeds and foundations. The structure becomes affected once the soil is dehydrated. Dehydrated topsoil volume substantially decreases and may suffer wind erosion
IMPORTANCE:
There is generally a high concentration of roots in this layer as plants obtain much of their vital nutrients here. Accurate depth of the topsoil layer is measured as the depth of the surface to the first densely packed soil layer known as subsoil.
CLASSIFICATION:
In soil classification systems, topsoil is known as the "O Horizon or A Horizon," therefore, it is the very top layer.