Selenium contamination of western soils is related to which of the following?
A)The application of chemicals by farmers.
B)Reliance of natural precipitation with no irrigation.
C)Concentration of a natural element in the soil through irrigation drainage collection.
D)Drainage of industrial runoff into agricultural areas.

Question

Quizplus · Accepted Answer

Selenium contamination in western soils is mainly caused by the collection of irrigation drainage, which naturally contains high levels of selenium. Over time, the concentration of selenium in the soil can become toxic to plants and animals. Chemical application by farmers, reliance on natural precipitation, and drainage of industrial runoff may contribute to soil contamination, but they are not the primary cause of selenium contamination in western soils.

Selenium Contamination of Western Soils Is Related to Which of the Following