LESIK, M. M. N. N.; MERLY, S. L.; WAHIDA, W. The Effect of Different Urea Levels and Fermentation Time of Rumen Waste Liquid Organic Fertilizer on Physical and Chemical Content (P2O5 and K2O). AGRICOLA, v. 11, n. 2, p. 122-130, 24 Sep. 2021.