How much fertiliser do I need to dissolve in the fertigation tank to fertilise to the correct level?

Mix the fertiliser with the amount of water that can be injected in the run time of the station.

For example, you worked out in step five that you will need to apply 105.2 kg of fertiliser.

In step six you found that you could inject 300 litres of water into the mainline in 30 minutes.

So dissolve 105.2 kg into 300 litres of water in the fertigation tank.

Stir until the fertiliser is completely dissolved.