Mahrus, Mahrus, and Ahmad Raksun. 2020. “Pengaruh Dosis Pupuk Urea Terhadap Pertumbuhan Kangkung Darat (Ipomoea Reptans poir.)”. Jurnal Pijar Mipa 15 (3):260-65. https://doi.org/10.29303/jpm.v15i3.1464.