EARTH SCIENCE
GROUNDWATER
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Crops are grown for animals as well as humans.
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Farms are situated on the sides of mountains.
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An Extended drought leads to little or no rain.
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The growing season of the crops is longer.
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Detailed explanation-1: -When fertilizers enter surface water, they cause problems in the watershed by-clogging narrow streams and preventing water from flowing properly.
Detailed explanation-2: -Agricultural lands can contribute to nonpoint pollution, particularly by nutrients, sediment, and agricultural chemicals. It is important to identify erosion control, nutrient, and pest and/or weed management practices to minimize these pollutants effectively.
Detailed explanation-3: -Pollution originating from a single, identifiable source, such as a discharge pipe from a factory or sewage plant, is called point-source pollution.
Detailed explanation-4: -The most common cause of fish kills is suffocation due to lack of dissolved oxygen. Most dissolved oxygen is produced by algae and aquatic plants through photosynthesis. A lesser but also important source of oxygen in water is diffusion from the atmosphere, which is enhanced by wind-induced surface water turbulence.