抄録
This study aims to establish the development of farmland from saline barren lands which is now attracting much attention in the world. There are several reasons for causing barren land like an unfavorable natural environment as deserts. Artificial caused include development. These activities have finally led the natural ecosystem to many unexpected tragedies. Moreover, they are causing land and soil erosion, floods and other disasters, producing vast areas of barren land. The theme of this study is to investigate methods how to improve saline soil caused by rock salt and convert it into arable land. This is one of the most difficult problems and no good results have been achieved, though some studies have been conducted on this subject. The author has obtained the following ideas through eight times of study abroad for the period of 1985 to 1993. The author found the characteristics of the natural ecosystem of salt-tolerant weeds that succession occurred according to the decrease in the salt concentration of the soil. These merits might be used in order to develop vegetation group artificially and turn barren land into fertile one.
