Optimizing the Planting Density of Lettuce (Lactuca Sativa) with Tilapia (Oreochromis Niloticus) in a Recirculation Aquaponic System Journal title: American Journal of Agricultural Science, Engineering, and Technology Authors: A.Q.M. Robiul Kawser,Md. Amzad Hossain,MST. Fahamida Yeasmin, Subject(s): Engineering, Agricultural Science, Science, Technology