Whilst Callum and Ali work in the greenhouse, Joss is recalibrating his sprayer on the quad lawn. A new selective herbicide, Trafalgar, is going to be used on the quad and as the dose rate is different from the previously used weedkiller, a trial run, using water, needs to be completed.
Once the correct amount of water to millilitre of chemical has been worked out for the area of the lawn, the correct spray nozzle needs to be chosen to allow the tank to be emptied over the entire quad. The pace at which Joss walks is also important as he doesn't want to reach the end of the lawn with some spray mix left in the tank. Having made all the adjustments to the nozzles and his walking pace, Joss is ready to spray the quad tomorrow, weather permitting.
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