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Fertile soils are also colloidal in nature. Which of the following acts as a protective colloid in soil?

(a) Organisms
(b) Water
(c) Soil particles
(d) Humus
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Answer: Humus
In the soil, the humus acts as a protective colloid. Because of the colloidal nature, soils adsorb moisture and other nourishing substance.
answered Mar 18, 2014 by mosymeow_1

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