Progress achieved in the equipment and the agriculutral machinery have been a great help to the farmers who had to live through the considerablechanges undergone by animal husbandry during the past fifty years. Important improvements took place, especially in the equipment involved in forage harvesting. reduced labour and increased farm sizes made it necessary for farmers to enlarge theire capacity of forage harvesting and concervation, while the forage quality had to be maintained. the technical improvements in the harvesting and conservation methods are recalled, among which the following are the most important : rotating blades ( with their increased cutting width made possible by hydraulic equipment), silo fillers, round balers, wrapping machines ( with their adapted plastic films), and mixing trailers.The adjustments of the machinery, sometimes resultingfrom joint studies, did also increase the safety of the users and at the same time ease their work.