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. Preventing soil erosion
B. Developing a vegetational cover
C. Preventing overgrazing
D. Introducing agriculture
A. Herbivores
B. Carnivores
C. Producers
D. None of these
A. Two types
B. Three types
C. Four types
D. Five types
A. A producer
B. A primary consumer
C. A secondary consumer
D. A tertiary consumer
A. Herbivores
B. Carnivores
C. Producers
D. Decomposers
A. Elton
B. Odum
C. Reiter
D. None of these
A. Afforestation of dry tracts with irrigation
B. Afforestation of canal banks
C. Reclamation of dry sites without irrigation
D. Reclamation of denuded hill slopes
E. All of the above
A. Competition for water and nutrients and for solar energy
B. Future agroforestry systems will have to overcome physiological (canopy structure) biological (pests and disease), ecological (Sustainability and environment protection) constraints besides being economically sound
C. Both (a) & (b)
D. None of these
A. Acacia
B. Aloe
C. Euphorbia
D. Rhizophora
A. Cyclic succession
B. Induced succession
C. Retrogressive succession
D. Allogenic succession
The correct answer to the question: "In order to maintain proper ecological balance:" is "A tree should be planted in place of one to be cut".
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