Forestry

Pond ecosystem

Lake ecosystem

Grassland ecosystem

Forest ecosystem

It ensures continuity of the forests indefinitely

It ensures steady income to owner

It helps better organization of works, and assures steady employment

All of the above

Producers (Autotraphy)

Macroconsumers (Hetrotrophs)

Microconsumers (Seprotraphs/Decomposers)

All of the above

Multiplies very fast to produce massive biomass

Has association of nitrogen-fixing Rhizobium

Has association nitrogen fixing Cyanobacteria

Has association of mycorrhiza

Hydro-electricity

Atomic energy

Coal energy

None of these

Two types

Three types

Four types

Five types

Shelterwood compartment system

Regular system

Successive regeneration system

All of the above

When mature crop is removed by clear felling and regeneration is entirely by vegetative methods

When some selected shoots are selected for retention for future period

When crop is partly of coppicing and partly of seedling organ of different age clear

None of these

Rhizosphere

Rhizoplane

Soil microflora

All of these

Ecesis, aggregation and competition

Migration, aggregation and competition

Aggregation, competition and coaction

Migration, ecesis and aggregation