The intensity of fragmentation of biomass by a rotary shredder was analyzed according to the size of the cuttings. Prior to shredding, the mass of the green cover per meter square was recorded for 75 equally spaced 1m2 areas. After the operation, the lengths of 100 fragments of the cut material were taken from the same 75 1m2 area samples. Data was processed using descriptive statistics and quality control techniques. The average quantity of biomass was about 1,796 kg.ha-1 with a coefficient of variation of 77.5%. After rotary shredder work the average lengths of fragments was about 19.1 cm with a coefficient of variation of 19.1%. The results showed that the fragmentation was uniforme despite the high variability of the biomass quantity.
shredder; fragmentation; evaluation; uniformity
