I heard about this. I cannot make any sense of it (I didn't see it as I cant remember when I last read the IFJ, I can never remember the my online password).
While soil conditions are in general excellent and seed is a bit smaller than normal, 6.5stn doesn't add up to me.
Even if you chose Cellule which has a small seed size - lets say 40 grams this year. Germination of 97%. Field losses of 10%.
I plant all my plots and crops to establish 300-310 plants/m2. I used to be lower but have found over time that I get more yield if I go up to this level.
So to establish 310 plants, I need 356 seeds. At 40 grams, I need 9 stone per acre.
Even with the smallest seed like Cellule, 6.5stn would only sow 255 seeds/m2 - nuts.
Most wheat varieties I have seen this year are in the region of 47-48 grams which at 6.5 stn would only sow 212 seeds/m2. Apply 90% establishment (good going) then you only end up with 190 plants/m2..........