Correct option is A
The correct answer is: (A) Less than 0.002 mm
Explanation:
Clay particles are the finest soil particles, and their diameter is less than 0.002 mm (2 microns).
Due to their small size, clay particles have a large surface area, which significantly influences soil texture, water retention, nutrient holding capacity, and cation exchange capacity (CEC).
Information Key Points:
Clay contributes to soil cohesion, plasticity, and water-holding capacity.
Soils high in clay are referred to as heavy soils due to poor drainage and aeration.
Clay particles have a high surface area, enhancing nutrient adsorption.
Additional Information:
More than 0.002 mm: Particles in this range fall under silt (0.002 – 0.05 mm) or sand (> 0.05 mm).
More than 0.02 mm: These are sand particles, Sand contributes to better drainage and aeration.
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