If an agricultural field is liberally irrigated for a prolonged period of time, it is likely to face problem of
Metal toxicity
Alkalinity
Acidity
Salinity
The maximum biomass of living diatoms to be found in
Out of the following biogeochemical cycles which one is gaseous?
$I.$ sulphur $II.$ Phosphorus
$III.$ nitrogen $IV.$ Carbon
Choose the correct option
Broad-leaved forests of oak are found in
The process of evapo-transpiration and precipitation is known as
Submerged hydrophytes exchange gases through