Experiments of mixed culture and calculation of competitive parameters between Microcystis (Cyanobacteria) and Scenedesmus (Green algae) Colonial cell growth of Dunaliella salina and Platymonas subcordiformis under different inoculation density and nitrogen concentration Effects of transgenic soybean on growth and phosphorus acquisition in mixed culture system Effect of Bacillus megaterium on Gluconobacter oxydans in mixed culture Research progress on plate mixed culture of lignocellulolytic microorganisms. Growth competition characteristics of Microcystis aeruginosa Kutz and Scenedesmus obliquus (Turp.) Kutz under non-steady-state nutrient limitation Research progress of microbial agents in ecological engineering N RESOURCE OF GRASSES AND N_2-FIXATION OF ALFALFA IN MONOCULTURE AND MIXTURE