Article published the July 4, 2018
    
    IntroductionThe intensive pig rearing system originates large amounts of waste; therefore, there is a great concern regarding the improvement of productivity and prevention of contamination of the environment with the waste. The nitrogen concentration in manure is relatively high and the excess is converted into substances like nitrate and ammonia, which are harmful to the environment, to the perf ...
    
    
 
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    May 23, 2018