NUTRIENT FILM TECHNIQUE Observations on the Structure of Chlorophytum comosum Roots Under Soiland Water Culture Observations on the Structure of Chlorophytum comosum Roots Under Soiland Water Culture Effect of NO-3 N concentration on nitrate nitrogen metabolism of winter wheat seedlings under water culture A PRELIMINARY REPORT ON THE FLOWERING HABITS OF CHINESE SACRED LILY IN WUHAN Effect of Water Culture on on Anatomic Structure of Roots in Philodendron pitfieri Engl. Root growth of wetland plants with different root types Water cultured propagation of Polygonum multiflorum and dynamic changes of physiological and biochemical characteristics during adventitious roots formation SELECTION OF FORM AND PH VALUE OF NUTRIENT SOLUTION FOR WATER CULTURE OF EUCALYPT SEEDLING