But lettuces have incredibly shallow roots and need a lot of nitrogen to build our favourite leafy greens. ???? ??? ????? ????? ?? ?? ??? ??? ????? ??????? ?? ????? ???? ?????? ?? ??? ??? ???? ?? ?? ??? ???? ??? ? ????? ????? ???? ??????? ??? ???? ?? ????.? ???????? ?? ??????????, ????????? ??????????? ???????, ??????? ???????, ??????? ??????? ? ?