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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
.
Check-dams that stops flowing away of rainwater
-
tanks
watershed management
riverlift system
rainwater harvesting
2
.
Condition caused due to scarcity of water
-
intercropping
mixed cropping
crop rotation
drought-resistant crops
drought
3
.
Two or three crops grown in a year with high yields
-
crop duration
decrease in soil fertility
crop rotation
increase in yield
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