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प्रश्न
Explain the following terms.
Colloids
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उत्तर
Colloids: Colloids are extremely tiny particles which are so small that they can not be seen by optical microscope ‘ and remain suspended indefinitely in water. They have the property of being electrically charged and can attract and hold ions of calcium, magnesium and potassium, known as bases. These bases are required by plants for their growth. – Soil colloids are also useful in holding water in the soil. When present in large quantities, they make the soil sticky and tough so that it is difficult to cultivate.
संबंधित प्रश्न
Give geographical reason:
Gases in the atmosphere affect weathering.
What is known as oxidation?
Give a technical term for the following:
Peeling off of the outer layer of rock through contraction and expansion.
Define weathering.
What is weathering?
How is humus formed?
What do you understand by the following term:|
Regolith
What are different types of soil according to their texture?
Define the following term briefly:
Soil texture
Give reasons for the following :
A soil dominated by clay makes tilling difficult.
