The tool asks for liquid fertilisers and pesticides to be given in weight (e.g Kgs, tonnes) and not volume (e.g mls, litres). Is there something i'm doing wrong?

The tool asks for liquid fertilisers and pesticides to be given in weight (e.g Kgs, tonnes) and not volume (e.g mls, litres). Is there something i'm doing wrong?

We don't currently have a liquid function so we take an approximation that 1Kg is 1L. This is in our pipeline for future development.