Botany - Environmental Issues Question with Solution | TestHub

Eutrophication is a natural state in many lakes and ponds, which have a rich supply of chemical nutrients, typically compounds containing nitrogen and phosphorus. Generally, it occurs due to excessive use of chemical fertilizers and causes the foul smell of water and the death of aquatic organisms.

Azotobacteris a free nitrogen-fixing bacteria, whileRhizobiumfixes atmospheric nitrogen in root nodules of plants.

Mycorrhiza are important mobilizers of phosphates and potassium for plant nutrition in the soil.