Our purpose with this article is to share the benefit of using a scatter plot created from hay test results for total digestible nutrients and protein to teach livestock producers four important forage and feeding concepts. The concepts are that a producer's hay is likely not of average quality, nutrients are not independent, hay quality varies on individual farms and across farms, and supplemental feed needs vary according to animal nutrient requirements and fall within one of four categories. Overall, our "tale of two nutrients" tool has served us well as an effective visual aid that can be adapted to meet local needs.
Gadberry, S., & Beck, P. (2018). Graphically Communicating Hay Test Results—A Tale of Two Nutrients. Journal of Extension, 56(4), Article 7. https://tigerprints.clemson.edu/joe/vol56/iss4/7