Two different patterns of using corn stalks as manure (incorporation into the soil) were tested on fluvo-aquic soil at the Quzhou Experiment Station of the China Agriculture University. The one-year experiment showed that N recovery rate increased because leaching of soluble N was low in the initial period of the incorporation of corn stalks and release of N increased in the late period. The content of nitric nitrogen in the soil varied remarkably with the crop -growing season, while ammonium nitrogen remained steady. The variation of microbiological nitrogen in soil coincided with the process of decomposition of the corn stalks. In most of the time, the plot with whole stalks incorporated in higher in microbiological content than the plot with smashed stalks incorporated.