3. In a village in Karnataka, people started cultivating crops all around a lake which was always filled with water. They added fertilisers to their field in order to enhance the yield. Soon they discovered that the waterbody was completely covered with green floating plants and fishes started dying in large numbers.
Analyse the situation and give reasons for excessive growth of plants and death of fish in the lake.
pls answer fast
Answers
the excess use of fertilizers in the feilds lead to the death of marine life in the lake
and the crip maybe if paddeywhich requires more water so this yeilds a good crop ...
hope it helps u
weak in economics........XD
Answer:
Since people used excessive fertilizers in the fields, they were carried down to the lake during rains through underground seepage systems.. As many fertilizers contain phosphates and nitrates, the water body became enriched with these chemicals, a phenomenon called eutrophication. These chemicals promoted excessive growth of aquatic plants and the surface of water was completely covered with plants.
Depletion of light in the water body and insufficient availability of dissolved oxygen and nutrients resulted in the death of fish.