which of the following agricultural practices can lead to algal blooms? select the two correct answers.
- sediments released by tilling of soil
- withdrawls of water for crop irrigation
- animal waste accumulated in livestock production
- application of nutrients to crops
- erosion caused by livestock overgrazing

Application of nutrients to crops

withdrawls of water for crop irrigation

Explanation:

Algal bloom can occur when excess of nutrients,hot water temperature leads to excessive growth of naturally occurring algae into thick mats on the water surface. Algal bloom occurs when excess nutrient supply to the crops,warmer temperature and low water supply results in rapid growth of algal bloom.Algal blooms are harmful to aquatic life by obstructing the fin of a fish, reduce oxygen content in water,it can discolor the water,form huge smiley piles on beaches change the taste of drinking water.

true is the