Question

What is the size of clay particles?
A)0.2 to 0.03 mm
B)1 to 2 mm
C)Less than 0.002 mm
D)2.0 - 0.06 mm

Answer 1

Hint: Clay emerges from the earth, usually in places where once there were lakes or rivers flowing. It is composed of rocks, plant life, all the soil ingredients, and animals. Over time, the remnants of flora, fauna, and minerals are broken up by water pressure, pulverizing them into fine fragments.

Complete answer:
The relative size of the fragments of sand, silt and clay. The soil consists of particles of varying shapes. Particles of sand appear to be the largest. Amongst the other two types of dirt, clay is the smallest particle. For very little to no airspace, the particles in this soil are closely mixed together with one another. This soil has very strong water preservation properties which makes it impossible for it to penetrate moisture and air. When wet, it is very sticky to the touch, but when dry, it is smooth. Clay is the densest and hardest soil type that does not drain well or provide room for the flourishing of plant roots.

The fragments of clay are very thin, less than 0.002 mm. Clay is a natural fine-grained rock or soil material which combines one or more minerals of clay with traces of oxides of metal and organic matter.

Hence, the correct answer is option (C)

Note: Three predominant types of soil exist: sand, silt, and clay. A lush, sandy loam is the best soil for most plants to guarantee optimum growth. This soil is an equal combination of the three major soil groups.