@Bluestreek,
I got it:
https://www.nutrientdataconf.org/PastConf/NDBC10/3-3_Tunlund.pdf
The reference for the B6 thing is on page 129.
I got it:
https://www.nutrientdataconf.org/PastConf/NDBC10/3-3_Tunlund.pdf
The reference for the B6 thing is on page 129.