said that it was necessary if it is considered as one process in the modernization of society.
However, the Green Revolution has some problems with environmental preservation, which has recently attracted more concern, and sustainable agricultural development. The previous environment and ecosystem may be changed by excessive use of chemical fertilizers and agricultural chemicals and the over-use of water by pumping to increase the yield. Also, if only specific varieties of rice are planted over a large area, each areas own traditional varieties which have been a part of the local natural environment may face extinction. Poor harvests may occur if only specific varieties are planted over a large area and are damaged by disease and insects or frost as well. (15)
It is necessary to think about the cultivation of different modem varieties to prevent those poor harvests in the short term, and conscious daily efforts must be made to preserve the many kinds of traditional seeds to guarantee future improvements to the crop varieties. Also, it may be necessary to improve the varieties to create ones kinder to the natural environment, and more suited to the natural ecosystem through low input.
There is a clear trend that as consumer 5 income increases, they eat less rice but choose tastier varieties, whereas in the past they ate more tasteless rice, as seen by the change in rice demand in Japan. In other words, even though the yield may be reduced, modem varieties also need to be improved to taste better, to maintain the demand for rice from high income consumers.(16)
Of course, there are still many people in other areas who prefer quantity to quality. Thus efforts should continuously be made to improve the high yield varieties for those people as before.
It is interesting that the political implication, as presented in the report of David and Otsuka, expresses doubt about the technological development efforts for rice for inefficient/poor environmental areas because negative points in that area can be eased by market adjustment over factors and products even though the poor environmental areas don't receive any benefit from the Green Revolution. However, it is asserted that areas which anticipate the benefits of
