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What is an example of a non protein nitrogen (NPN) used as a protein source in dairy feeds?

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What is an example of a non protein nitrogen (NPN) used as a protein source in dairy feeds?

(a) nitrogen

(b) phosphorus

(c) magnesium

(d) urea

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The correct choice is (d) urea

Easy explanation: Non-protein nitrogen compounds (NPN) are a group of high-protein feedstuffs. NPN feeds are feeds which contain nitrogen in a form other than peptides or proteins. Urea is an example of NPN.

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