But "MTbWg" is "The total weight of marketable tubers per plot" ---- note "per plot", not "per ha"
And "Dry weight" is the "Dry weight of a potato sample"; not per plot or ha
In fact, I do not think it is possible to compute yield for these data; but I have estimated it anyway.
You also has some dates wrong (perhaps confused by the yyyy-mm-dd order?)
I have also added more info about pesticides. It may still be incomplete. It is complicated to extract it all. Either way, I think this is more relevant for surveys than for experiments like this, so I am not too worried about that.
The yield data were wrong. You had
But "MTbWg" is "The total weight of marketable tubers per plot" ---- note "per plot", not "per ha" And "Dry weight" is the "Dry weight of a potato sample"; not per plot or ha
In fact, I do not think it is possible to compute yield for these data; but I have estimated it anyway. You also has some dates wrong (perhaps confused by the yyyy-mm-dd order?) I have also added more info about pesticides. It may still be incomplete. It is complicated to extract it all. Either way, I think this is more relevant for surveys than for experiments like this, so I am not too worried about that.