Baling is essentially packaging performed to facilitate handling, transport, and storing using the baling machines. The present study was conducted to investigate some operating parameters which affecting on the performance of balersuch as forward speed; material moisture content and baler feed rate on the baler performance. The field experiments were carried out at Libya on four baler forward speeds (1.5, 3.0, 4.5, and 6.0 km /h); four levels of moisture content (8-10, 11-13, 14-16, 17-19 %) and various baler feed rates of (1.3, 2.5, 3.9 and 5,2 ton / h). The study indicated that, increasing baler forward speeds from 1.5 to 6.0 km /h increased field capacity by 51%, bale productivity by 47% and fuel consumption rate by 53%. On the other hand, increasing baler forward speed tends to decrease field efficiency by 35%, bale density by 33%, and energy requirements by 41%. Increasing material moisture content from 8-10 to 17-19% and baler feed rates from 1.3 to 5.2 ton/h Increased the bale density by 15 to 20%; 8 to 13% respectively; and decreased the size required for storing bales by 20%., increasing material moisture content of bale straw from 11 to 13% decreased the fuel consumption and energy requirements by 15%.