KDSC that will be very easy. You just take the ingredients in lbs multiply that amount by the percentages of protein as-fed per ingredient, add the total lbs of protein up and set up an equation for %. I have not looked up the protein content for your ingredients, but I will use your ingredients for a simple example, again I guessed on the protein content. You will need to get into a book or on the computer to find the actual %s.
1200lbs corn X 9.3%=111.6 lbs protein
400lbs cottonseed hulls X .05%=2lbs
200lbs rolled oats X 11.5%=23lbs
200lbs SBM X 44%=88lbs protein
add up the protein, gives a total of 224.6 lbs of protein as-fed basis. Now we set up an equation to find percent protein for the whole ration, or 224.6 X 100/2000 = Y. or 22460/2000= 11.23%protein. does that all make sense to you? If you want a little higher final protein content I would add a little SBM or the SBM that is used here could be 48% which is what I usually would use b/c it is usually cheaper /lb of protein.
KDSC why don't you figure out the protein ration using 48% SBM and post it back up please. Homework on the board, who would have guessed?I'll be waiting for your answer. LOL. Cab