Gradien Longitudinal Nitrat (No3-) Dan Fosfat (Po43-) Di Sungai Air Hitam Kot…

ABSTRACT Longitudinal Gradient of nitrate (NO 3 - ) and phosphate (PO 4 3- ) in Air Hitam River was carried out in September 2021. This study aims to determine the Longitudinal Gradient of nitrate and phosphate in the Air Hitam River Pekanbaru City. There were 5 stations, namely Station 1 (upstream), Station 2, 3, 4 (in the middle of river), Station 5 (down stream). Sampling was done 3 …