SELECT * FROM question_mgmt as q WHERE id=4300 AND status=1 SELECT id,question_no,question,chapter FROM question_mgmt as q WHERE courseId=8 AND subId=16 AND chapterId=195 and ex_no='2' AND status=1 ORDER BY CAST(question_no AS UNSIGNED) CBSE Free NCERT Solution of 9th science Improvement in Food Resources how do biotic and abiotic factors affect crop prod

Question:

How do biotic and abiotic factors affect crop production?

Answer:

Biotic factors such as pets, insects and diseases reduce the crop production. A pest causes damage to our crops by feeding. Weeds also reduce crops productivity by competing with the main crop for nutrients and light.

Similarly, abiotic factors such as temperature, wind, rain etc. affect the net crop production. For example droughts and floods have a great impact on crops sometimes, destroying the entire crop.


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