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Subjects
Science CBSE
Class 9
Improvement in food resources
Crop yield improvement
12.
Crop rotation, tanks, droughts
Exercise condition:
5
m.
Choose the correct option
:
1
.
Water drawn directly from rivers
-
riverlift system
watershed management
tanks
rainwater harvesting
2
.
Condition caused due to low rainfall
-
intercropping
drought-resistant crops
drought
crop rotation
mixed cropping
3
.
Two or three crops grown in a year with high yields
-
increase in yield
crop rotation
crop duration
decrease in soil fertility
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