水稻土污染

removal of surplus soils maturation of soils duration of pollution zone of mild pollution oil pollution of waters histopathology of pollution injury legal remedy of air pollution prevention of marine pollution area economic measurement of enviromental pollution urban scale of air pollution bleached soils pollution amelioration of low productive paddy soils weeding of paddy field piece of paddy field classification of paddy soil irrigation of paddy fields air capacity of soils development of soils depth of soils alkaline extracts of soils mixing of soils podzolization of soils