? ??????? ???????? ????? ??? ????? ?????? ???????, ??? ??????? ??? ???? ?? ????? ??????? ?? ???????? ??????? ?? ??????????:These early tractors were cumbersome, and sick-suited to enter a area of planted row crops for weed Command. The "normal" tractor definition is no more in present-day use. On the other hand, tractors with set wheel spacing and