Effects of sawdust-cow dung biochar, nitrogen, and phosphorus on the growth of ipomoea aquatica and soil enzymes / Nishat Farabi. [MS Thesis] Farabi, Nishat. 361.422 FAE Includes Bibliographical references. Dhaka : University of Dhaka, 2022. 2022. 2022 Text 100 p. in various pagings : eng