Learn how to create this graph here.
This graph is a double-Y column graph with gap across layers.
We might normally plot two datasets such as these into a single layer, but since these two differ in range, it is more visually pleasing to plot them on two layers as a double-Y graph.
The "potassium" data ranges from 10 to 100, while the "phosphorus" data ranges from 0 to 10. It is more visually pleasing to plot these two datasets into different layers with different Y axes.
After changing the plot type to Column/Bar, add the gap across layers to avoid the overlay of these two sets of cloumns.