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Eastern Ontario | I've looked into this just a little myself for the same reasons you state. What I have learned so far is that a true roaster heats the beans to around 375F and maintains that temperature for about an hour. One particular manufacturer (www. diltswetzel.com) produces a farm size roaster that further steams the beans an additional hour before they exit at 250F.
Their claim is you can justify the cost of their roaster if you finish a minimum of 500 hogs/year. Their stats are that hogs gain 8-10% more rapidly and require 10% less feed/lb gained when fed oil-in soybean.
Personally, I take any info a company or salesman "feeds" me with a grain of salt. But this is a starting point. I am sure much data exists on university research sites. But to answer your question, I would be extremely nervous feeding hogs soybeans that were only heated to 150F.
Cheers,
Larry | |
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Roasting Soybeans
