Ministry of Agriculture, Fisheries and Food; National Agricultural Advisory Service; National Institute of Agricultural Engineering
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A study of the means of increasing the adhesion of pneumatic tyred farm tractors. Continuation of part I, please see TR MAFF PH6/286. Film shows filling of tractor tyres with liquid ballast, to different levels and illustrates the difference between ploughing with and without the ballast. With captions. Ministry of Agriculture, Fisheries and Food National Institute of Agricultural Engineering and National Agricultural Advisory Service
