GENERAL GEOLOGY

Detailed explanation-1: -Pesticides come in spray cans and crop dusters, in household cleaners, hand soaps and swimming pools. Insecticides are generally the most acutely (immediately) toxic. Many are designed to attack an insect’s brain and nervous system, which can mean they have neurotoxic effects in humans as well.

Detailed explanation-2: -This runoff can contain pesticides, sediment (soil particles), nutrients (phosphorus, nitrogen and potassium from fertilizers) and metals, which can contaminate sources of water.

Detailed explanation-3: -Irrigating saturated soils or irrigating at a rate that exceeds the infiltration rate of soil promotes runoff that can carry pesticides with it. Irrigation that promotes the frequent downward movement of water beyond the root zone of plants also promotes the leaching of substances including pesticides to ground water.

Detailed explanation-4: -Agricultural runoff has complex pollutant compositions including nitrates, ammonium, phosphorus compounds, heavy metals, and persistent organic pollutants.