Hay standard


Albrect Thaer (1972-1828) German Scientist

  • In 1810 German scientist Thaer, suggested that different feeds should be compared using meadow hay as a unit.
  • He published the " HAY EQUIVALENT" as measure of relative value based on determining the materials in feeds extractable with water (and other solvents).
  • This standard provided that 100 lbs. of meadow hay was equal in nutritive value to 91 lbs. of clover hay or 200 lbs. of potatoes, 625 lbs. of mangels.
  • Nothing was known of the chemical value of these feeds and the physiological requirements of the animals.
  • The only measure was the practical feeding experience.
Last modified: Sunday, 13 November 2011, 4:02 AM