Forage tests today contain two values summarizing feed quality. While similar, understanding the unique differences of each is important to accurately value a forage. Today we will look at Relative Feed Value or RFV and Relative Forage Quality or RFQ.

For many years we have used a forage testing system that measured two different types of fiber called NDF and ADF. We used NDF to estimate how much hay cows would eat and we used ADF to estimate how much energy they would get from that hay. Then we combined those values to give an overall estimate of forage quality that we called RFV, which stands for relative feed value.

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