So if I understand, you want 8 Kanza per 1 Hark. You don’t want a full row of Hark and next to it a full row of Kanza, correct?
To answer your pollen question you can plant any number of Hark or Kanza so long as there is at least (1) Hark per (8) Kanza or more than 1-Hark. You could do 16 Kanza but you will need (2) Hark trees. Or you could do any combinations of either so long as the 1:8 quotient is filled.
The placement will depend upon how many Kanza you want or how many Hark you want. Does that make sense? Again, 1 per 8 do you understand? The placement will vary dependent upon how many of each.
What I said is if you want to easily keep your crops separate, then you don’t alternate trees for example but rather you plant a row of the same variety/cultivar.
Pollination is best achieved when the single tree that is going to pollinate the other eight is placed where the pollen will best be blown from natural wind which is the first tree at the northwest end of a row. Of course you’re doing 4-acres so there will be correct patterns or placement but you need to tell us how many Kanza you will plant and how many Hark you will plant.
Hope this helps!