Milk sludge is a source of carbon that can be used together with the liquid waste of dairy farms into products, namely organic soil reformers. Organic soil-forming products can be used in the treatment of liquid waste from dairy farms and milk sludge from the dairy processing industry. This study aims to determine the plowing of the dose of milk sludge in the liquid waste of dairy farms that are most effective against the content of organic soil improvement. The research was carried out experimentally using 4 treatments, namely P1 (concentration 0%), P2 (concentration 10%), P3 (concentration 20%), and P4 (concentration 20%) and four repeats. The data will be analyzed using a Complete Randomized Design (RAL). The changes observed were the content of C-organic, pH, and the number of coliform bacteria based on estimator and booster tests. The results of the study showed that all treatments had different influences results on the content of Corganic, pH, and organic soil-forming coliform bacteria. Milk sludge in the liquid waste of dairy farms with a concentration of 30% at the time of observation of week 3 produced an organic soil reformer with the content of C-organic, pH, and coliform bacteria in accordance with the minimum technical requirements of the Ministry of Agriculture No. 261 of 2019.
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