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Science CBSE Homework Assignments
Class 9
Improvement in food resources
Cropping patterns and Infestation
2.
Crop rotation, tanks, droughts
Question:
5
m.
Choose the correct option
:
1
.
Rain water percolates to increase groundwater levels
-
watershed management
riverlift system
rainwater harvesting
tanks
2
.
Different crops grown in a pre-planted succession
-
crop rotation
mixed cropping
drought-resistant crops
drought
intercropping
3
.
Two or three crops grown in a year with high yields
-
crop duration
increase in yield
decrease in soil fertility
crop rotation
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