The limiting factor in nitrification of soil is
$pH$
Temperature
Light
Air
The circulation or cycling of elements in an ecosystem is known as
Which are the biotic components of forest ecosystem
The changes that occur in successive seral stages to reach a climax community are
$I.$ changes in the diversity of species of organisms
$II.$increase in the number of species and organisms
$III.$ increase in the total biomass
Choose the correct option
Arrange the following as observed in vertical stratification of a forest : Grass, Shrubby plants, Teak, Amaranths.
Which of the following is the major source of phosphorus