A study on the physiological properties of root systems in various wheat varieties and the effects of their phosphorus uptake and utilization efficiency on the yields Effects of soaking seeds with DPC on the physiological functions of root system and leaf of peanut seedlings Effect of Vanillin on Nutritient Absorbency of China fir Seedlings Studies on the Nitrate Reductase Activity (NRA) and the Nitrogenase Activity (NA) in the Nodules of Groundnut (A.hypogaea L.) The correlation of dry biomass and activity of root system with grain yield in raton rice(Oryza sativa L) Effects of cooperation between associative azotobacteria and rhizobia on wheat seedling Effects of winter crops on enzyme activity and morphological characteristics of root in subsequent rice crops Effect of Simulated Acid Rain and Its Acidified Soil on the Biomass and Some Physiological Activities of Wheat Seedlings