THERE IS MUCH TO LEARN FROM PAST AGRICULTURAL PRACTICES

The water running off this farm held contains many pesticides and fertilizers that can be harmful to ecosystem.s and human health. 

Poor maintenance of topsoil is also a major concern. Synthetic fertilizers have no organic bulk and do not provide a food source for soil microorganisms and earthworms. Over time, a soil treated with only these fertilizers loses biological activity, which diminishes the soil s fertility. Soils void of organic bulk become chalky and susceptible to wind erosion. Chalky soils lose their capacity to hold water, which means that more applied fertilizer is leached away. Ever-increasing amounts of fertilizer are thus needed. 

Poor soil-conservation practices in the early 1900s contributed to the loss of mucli topsoil to wind stomis thick with dust. 

The San Joaquin Valley of California has subsided by more than 35 feet since the pumping of groundwater began in the 1920s. 

Was this your answer Land contains a variety of salts. As water runs over and through the land, these salts dissolve in the water. In general, the farther the water travels, the saltier it becomes. Thus even water that has traveled only a short distance, which is the case with a mountain stream, contains some salts. So the answer to this question is a qualiflt yes, but not enough to make the water undrinkable.  

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There Is Much to Learn from Past Agricultural Practices... 

THERE IS MUCH TO LEARN FROM PAST AGRICULTURAL PRACTICES... 

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