GLAS is only one of the farming related regulations that has been develop to promote sustainable farming. I will refer to that in my research of course but what is important for me is Water Regulations , Nitrogen Action, etc which are dealing with amount of nutrients (which are chemical such as nitrogen, phosphorus, carbon and so on ) in the polluted water.
So the regulations will ask for certain amount of each of these nutrients to be allowed to be found in t the water.
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