The reference that you allude to is hard to find. We put some calculations together to come up with our "best guess." Remember that cattle can experience urea toxicity, so care must be taken. If you soak grain in a solution, with enough water it can easily take up 25% of its weight in water; however, the cost of drying is a factor. Our guess is that they added about 10% water by weight and tried to get complete absorption . You would have to mix this a couple of times and allow about 24 hours for complete absorption. That being said, with urea being 281% protein, you would need 1% urea by barley weight to raise protein 2.81%. So 89 lb of barley, 10 lb of water, and 1 lb of urea would raise protein 3.1%. Conversion of urea to ammonia (NH3) may allow for some loss, but we do not know how much.

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