Mechanisms of bicarbonate induced iron-deficiency chlorosis of peanut on calcareous soils STUDY ON MECHANISMS OF IMPROVEMENT OF IRON NUTRITION OF PEANUT BY INTERCROPPING WITH MAIZE OR WHEAT EFFECT OF MAIZE/PEANUT INTERCROPPING ON ROOT Fe(Ⅲ) REDUCING CAPACITY AND IRON NUTRITION OF PEANUT EFFECT OF MAIZE/PEANUT INTERCROPPING ON IRON NUTRITION OF PEANUT Fe Accumulation and Mobilization in Root Apoplast of Soybean Seedlings Under Fedeficiency Condition Effects of improved iron nutrition of peanut intercropped with maize on carbon and nitrogen metabolism and nitrogen-fixing of peanut nodule Effects of different nitrogen levels on iron nutrition and nitrogen fixation of peanut in maize-peanut mixed cropping system Effects of the iron nutrition on nodule development and nitrogen-fixing functions of peanut