In text questions of page no 205 Chapter 15: Improvement in Food Resources Science Class 9 solutions are developed for assisting understudies with working on their score and increase knowledge of the subjects. How do biotic and abiotic factors affect crop production, What are the desirable agronomic characteristics for crop improvements is solved by our expert teachers. You can get ncert solutions and notes for class 9 chapter 15 absolutely free. NCERT Solutions for class 9 Science Chapter 15: Improvement in Food Resources is very essencial for getting good marks in CBSE Board examinations
Q. No. 1: How do biotic and abiotic factors affect crop production?
Ans:
Biotic factors such as pests, insects and diseases reduce the crop production. A pest causes damage to our crops by feeding. Weeds also reduce crop 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.
Q. No. 2: What are the desirable agronomic characteristics for crop improvements?
Ans:
The desirable agronomic characteristics for crop improvements are:
(i) Tallness and profuse branching in any fodder crop.
(ii) Dwarfness in cereals.
These desirable agronomic characteristics help in increasing crop productivity.
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