Suwannakan Supmattrra, Piyaporn Jitaek, Khongdet Phasinam, D. W. P. C. P. P. (2021). EFFECTS OF WATER LEVELS AND DISSOLVED OXYGEN CONCENTRATION ON THE GROWTH OF CELERY CULTIVATED IN A DFT HYDROPONIC SYSTEM. Design Engineering, 3669- 3675. Retrieved from http://www.thedesignengineering.com/index.php/DE/article/view/2788