The main fertilizer used in agriculture, including compounds of nitrogen and phosphorus Phosphorus in the form of phosphate can be attached to the soil. It is less that flows with the water. So the substance problem is nitrogen.When it rains, rain will wash out the nitrogen flow through the ground into the river. Help the algae grow well, a lot of, rising tide color, smell and taste when these algae you break down. It will make the operas stinks and phenol higher.
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