Fig. 4
![Fig. 4](http://media.springernature.com/full/springer-static/image/art%3A10.1186%2Fs12302-021-00572-1/MediaObjects/12302_2021_572_Fig4_HTML.png)
Soil P leaching change point based on the relationships between Olsen P and leachable P in soils under agricultural land calculated by SPLERC
Soil P leaching change point based on the relationships between Olsen P and leachable P in soils under agricultural land calculated by SPLERC