American Society for Microbiology - optimum ranges of PH and temperature for Bifidobacteria phytase activity. The optimal temperature for enzyme effectivity is 50 C, but bacterial growth is optimized at 30 C. You can improve enzyme effectiveness by heating slightly for 1-2 hours after fermentation is complete.
Cornell University - moderating meat intake, getting rid of grain fed animals, and switching to animals with a high feed conversion ratio will feed as many or more people than a vegetarian diet. Graph shown is for grain fed animals with a low feed conversion ratio. Make the change and meat would be much more competitive.