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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
What is weathering?
Say whether the following is ‘True’ or ‘False’.
In dry climates mechanical weathering is dominant.
On what factors does the weathering depend?
What do you understand by the following term:|
Exfoliation
What are the various factors governing the formation of soil? Which one is the most important and why?
What do you understand by the following term:
Soil texture
State the effects of weathering.
Give reasons for the following :
Farmers are encouraged to adopt soil conservation methods.
Explain the following terms.
Bases
Which one of the following materials is affected by hydration process?
