Film shows how cattle herds can be improved by grading up, culling poor producers and breeding with good stock. Herd of cattle. Cattle market, where farmers buy replacement cattle rather than breeding them. Faults shown on a cow. Herd shown with some good and some bad cows, 15 different breeds and crosses in herd and have low milk yields. Another herd with just one breed still have a low milk yield. Grading up scheme outlined, Mr Sherrat's farm has such a policy, keeping records. Diagram of average yields showing how milk yield will go up if cull poorest producers. Good points of replacement cows. Good breeding will also get a better herd. Good points of a dairy bull. Farmer [Mr Sherrat] studies the sons of a good bull as he can't afford a proven bull. Bull pedigree shown. Farmer examines the sire and sire's daughters and dam. Tethered bull. Agricultural committees can buy bull calf from. Explain how a herd can be pedigree in 10 years. Pedigree herd shown. Ministry of Agriculture, Fisheries and Food? Crown Film Unit
