1.
Soil erosion is the function of
2.
Digging pits on the slopes just for the accumulation of run off is called as:
3.
Wind velocity higher at
a
50 m height from the ground
b
80 m height from the ground
c
100 m height from the ground
d
150 m height from the ground
4.
Mulch tillage increases
a
Moisture content in the soil
5.
If there is a little slope in the field, the soil erosion can be prevented by:
6.
The most common method used for cultivation on hills:
7.
Eroded soils are:
b
Devoid of plant nutrients
c
Unaltered in plant nutrients
8.
To prevent wind and water erosion, the crop is sometimes harvested in such a way that a basal stub of the plant is left behind. This phenomenon is called:
9.
' Chipko Movement ' is related to:
10.
The grazing animals can change the type of vegetation by:
c
Bringing in plant pathogens
d
Bringing the seeds of other plants
11.
When young plants are grazed too heavily they get killed because:
b
Of the mechanical injury to roots
c
Most of the aerial parts are eaten away
12.
Fifth of June is celebrated as:
d
World health and hygiene day
13.
The disadvantage of ploughing in arid and semi-arid zones is:
b
Soil organisms are exposed
c
Soil particles became smaller
14.
Sheet erosion is caused by:
15.
Bunds, dams and drains are constructed to prevent:
