? ??????? ???????? ????? ??? ????? ?????? ???????, ??? ??????? ??? ???? ?? ????? ??????? ?? ???????? ??????? ?? ??????????:These early tractors ended up cumbersome, and sick-suited to enter a area of planted row crops for weed Command. The "standard" tractor definition is no more in existing use. Even so, tractors with set wheel spacing in addition