A. Delonix
B. Mangifera
C. Eucalyptus
D. Prosopis
Soil Erosion and Conservation
Soil Erosion and Conservation
A. Plant conservation
B. Project tiger
C. Animal breeding
D. Operation flood
A. The existing forests should be cleared and new ones should be planted
B. Some quick growing anuals should be planted if a tree must be cut for other uses
C. Tree must be cut whenever necessary because the underground part performs the useful purpose
D. A tree should be planted in place of one to be cut
A. Upper layers of soil are loosened and are eroded
B. Lower layers are made more compact and root respiration is interfered with
C. Lower compact layers make root penetration difficult
D. All of the above
A. Afforestation
B. Deforestation
C. Denudation
D. Overgrazing
A. Dense forest
B. Grassland
C. Bushy vegetation
D. Desert
A. Addition of their excreta to the soil
B. Eradication of weeds
C. Removal of wild plants
D. Removal of wild animals
A. The roots are starved
B. Of the mechanical injury to roots
C. Most of the aerial parts are eaten away
D. All of the above
A. Allowing herbivorous animals to graze excessively
B. Growing plants to form a soil cover
C. Making the land slopy
D. Increasing fertility
A. Bringing in plant pathogens
B. Selective grazing
C. Cross pollination
D. Bringing the seeds of other plants