More pictures of wet zone
![PDF] N and P variation in Groundwater in Wet Zone and Dry Zone in Sri Lanka due to Fertilization to Paddy Crop | Semantic Scholar](https://i0.wp.com/d3i71xaburhd42.cloudfront.net/23f342a60777eb8f5650b1281edeaf30c38875fd/4-Figure2-1.png)
wet zone
