Impacts of organic and inorganic fertilizations on alfalfa yield, soil nitrate and greenhouse gas emissions. Effects of organic fertilization on winter wheat photosynthetic characteristics and water use efficiency in semi-arid areas of southern Ningxia Effect of no-tillage on soil aggregate and organic carbon storage Effects of long-term fertilization modes on spatio-temporal distribution and accumulation of soil nitrate nitrogen in solar greenhouse Effects of combination of organic and inorganic fertilization on maize yield and soil nitrogen and phosphorus leaching