Bells vs. Anaheims, Anaheims winning

I wasn't really sure if Bell peppers should go in a hot pepper discussion, so I brought them here.
 
My 8th acre is made of a many-thousand years long composting process, otherwise known as the Red River Valley of the North. This stuff will grow anything, granted the weather and climate cooperate...I'm in zone 3, so bay laurel and olive trees are out, but I can grow some amazing specimens of nightshade, lentil and tubers!
 
I'm posting this as a query because I think, being as this is primarily a pepper site, someone will know. I have three rows of Anaheim chiles and two rows of bell peppers, each 20 foot long. My chile harvest is going to be huge this year, but the bells, though they look lush and healthy, are producing very little, some have no fruit whatsoever. These plants are all from seed and transplanted to the 8th acre on the same day in May. I'm wondering what nutrient in my soil the anaheims love yet the bells either are missing or have too much of. They flower but do not set fruit, or not very much. No, I don't have a soil tester, never really had need for one, but then again I've never had this lack of production in my bell peppers, especially considering how great the chiles are doing.
 
For some crazy reason I tilled in a cubic yard of aged turkey manure two seasons ago and some of my vegetables burned pretty bad for it. But this is the first season my bells don't want to perform....
 
Thanks for any input, guesses also welcome....
 
Eric

How hot has it been there? I guess there's too much nitrogen in the soil or the temperature is too high for them to set much fruit.
 

Heat has been mid to high 80s consistently, if there's any difference it's been rain. We've had a wet season, though I read that peppers like around an inch/week, and we've only been getting a quarter to a half inch over that. Drainage is slow in this muck, but it hasn't been an issue before.
 
I do grow a lot of beans, green and lima, but only corn is planted where beans were the previous year.
 
Is there a nutrient requirement difference between chile varieties and sweet varieties? The anaheims are producing a dozen plus HUGE chiles each...

I wouldn't normally grow either bells or anaheims, as nice pods can be bought cheaply here, but when I was ready to plant, I couldn't find what I was looking for, so planted a single anaheim starter.  It's been one of my favorites - it started producing quickly and while I was waiting for two peppers to get a little bigger, they started turning red, which never happened with my anaheims last year.  They were sweet and delicious.  I've had to wait a long time, but the last pepper of the season is almost ready (see pic).