Total nitrogen by in the area aroun

Total nitrogen by in the area around the island is higher in Nong Kom The area around the Khon Kaen University. And the forest conservation in Khon Kaen University, the amount of phosphorus. In the area around the Nong Kom Ko is the largest in area and forest conservation in the university campus is the Nong Khai of potassium In 3 area has high potassium content