NCERT Important Questions Class 9 Science biology Chapter 15
Important NCERT Extra Questions
Chapter 15 Improvement in Food Resources
NCERT Book Extra Questions for Session 2022-2023
CBSE Board and UP Board Others state Board
What should be do to get maximum benefit from a crop field?
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To get the maximum benefit from a crop field, we should
(i) maintain the soil fertility through judicious use of manure and fertilizers.
(ii) practise crop rotation.
(iii) employ mixed cropping and intercropping method of agriculture.
(iv) keep the weeds and insect pest population under control.