Respon Pemanfaatan Limbah Cair Kelapa Sawit Terhadap Pertumbuhan dan Produksi Tanaman Kailan (brassica oleraceae l.) The Response Of Liquid Waste Utilization Of Palm Oil On Growth And Production Plant Of Kailan (Brassica Oleraceae L.). Under the guidance of Ir. Gusmeizal,... TN Nainggolan,...