The minimum protein requirement for growing dairy heifers

Text from page 1: "By minimum protein requirements of growing dairy heifers is meant the least quantity of protein in the ration which will allow normal growth to proceed. A study or investigation leading to a knowledge of the minimum amount of protein to be fed growing dairy heifers, to solve the fundamental problems should be conducted with animals receiving purified food substances, and every nutritional factor should be under complete control. It is obvious that this is entirely impractical with such large farm animals as dairy heifers. Consequently the results cannot be entirely satisfactory from a scientific standpoint. Yet if such experiments are properly controlled they should give results of value both scientifically and practically."