The aptitude and performance of the agricultural tractors on field conditions have been influenced by the tractor weight. This parameter has varied mainly according to the manufacturers, generating a demand of comparative information. The objective of this research was to analyze the weight of Brazilian agricultural tractors, aiding in the selection and in its appropriate use. The present research included 103 models of commercial tractors of the brands Massey Ferguson, Agrale, New Holland, John Deere, Ursus and Valtra. Tractor weight and weight/power relationship, separately in different brands, traction type and power groups, were analyzed. The data were analyzed through the t test (Student). Significant differences were observed for the brands and power groups when the weight/power relationship was considered. The parameter weight has differed also for the traction type. Besides, the weight/power relationship without ballast weight has decreased with the increase of power. Therefore, Brazilian agricultural wheeled tractors are heterogeneous regarding weight and weight/power, what influences their economic performance. These parameters must be considered during the use and choice of a tractor.
tractors; ballast; efficiency
