यहाँ विद्यार्थी एवं शिक्षक अपनी कक्षा एवं विषय से सम्बंधित प्रश्न पूछ सकते हैं। इसके लिए नीचे दिए गए अपनी कक्षा के विषय के लिए निर्धारित बॉक्स में अपना प्रश्न अंकित कर सकते है। साथ ही, पूछे गए प्रश्नों के उत्तर भी दे सकते हैं। 

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विज्ञान

    • केंचुऐ को किसानों का मित्र क्यों कहा जाता हैं?
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Satish

Earthworms are termed as  the friend of farmers due to following reasons:-

1> Earthworm increases the fertility of soil by increasing the amount of air and water that gets into the soil due to pores created by them which facilitates aeration as  well as increases seepage.

2> They bring down organic matter from the upper most level of soil and mix it with the lower level of soil which increases nutrient availability to crops.

3> Their activities cause fragmentation of the dead organic matter resulting formation of humus which increases fertility and water holding capacity of soil.

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