 หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Interrelationship between Azotobacter and Clostridium in Increasing The Yield of Paddy and Nitrogen Uptake ) ผู้เขียน: Neerun Singhabootra1, W.V.B. Sundara Rao2 สื่อสิ่งพิมพ์:pdf Abstract The conversion of nitrogen in the form of gas into nitrogen compound by biochemical processes is rather small, but the processes continue throughout the year, if the climate and other factors such as nutrients, temperature, moisture, pH, aeration, number and strains of micro-organisms are suitable. Bhat and Palacios reported in 1949 that nitrogen fixation in the soil was favoured by moisture and absence of direct sunlight. Gupta (1956) manured alkaline clay and acid sandy soils and found that manured soil showed greater nitrogen fixation than the unmanured soils. In 1958 Sharma and Bhattacharya noted that in alkaline soil, the presence of calcium phosphate alone or with glucose or starch promoted the oxidation of organic matter and increased nitrogen fixation. Vojinovic (1956) reported that most important factors, were nature or organic matter and the phosphate lever. De and Mandal (1956) observed the application of molybdenum with phosphorus caused greater nitrogen fixation than phosphorus alone. |