I actually bought a few pounds of amarillo but i found that it really doesn't have the same 'magic' that it first had for me, i still have a pound and a half of the stuff sitting there. Its ok, but tis not the delightful amarillo that i rememeber when I first joined this site.
I think Charst's findings back here about the Podcast with Gerard Lemmens may be on the money. That 6.9% stuff was crap, but I've had Amarillo form seasons since and they just are not that wow factor anymore. It's one hop that is no longer a the top of my favourites.
QldKev
Seasonal variabilty affects all fruit/flower crops.
You only have to look at grapes to see what a microclimate in a region can do to variability of the same variety.
Weather patterns are also incredibly variable and I guess could play a major role in AA% depending on which part of the growth cycle of the plant is in during a prolonged dry/wet/cloudy/windy spell.
Handling, time of harvest, direct sunlight, process, downtime in the factory, transport, storage, critters...could a windy week disperse or damage AA% content??
What about the 2009 Amarillo that wasn't 6.9%? That's the part I don't get.