Fastinger, N. D. and D. C. Mahan. 2003. Effect of soybean meal particle size on amino acid and energy digestibility in grower-finisher swine. J. Anim Sci. 81:697-704. Link to full text (.pdf)

Take-home message:

• Grinding soybean meal to a smaller particle size results in an improvement in amino acid digestibility.
• Initial particle size of SBM varies among SBM producers and should be evaluated prior to grinding.