Distribution of clay minerals in volcanic soils of Indonesia and its application to an appropriate fertilization

本研究的目的是在爪哇岛和苏门答腊岛的火山地区建立适当的肥料管理，这是印度尼西亚最重要的山地农业区。揭示了控制养分动态的粘土矿物的分布，以及地质和气候对其分布的影响。通过试验还获得了田间养分动态的详细信息。所得结果将对该地区建立合理的肥料管理有很大的帮助。

The goal of this study was to establish a proper fertilizer management in volcanic area of Java and Sumatra islands which is the most important upland agricultural area in Indonesia. The distributions of clay minerals which control nutrient dynamics, and effects of geology and climate on the distribution were reveled. Detailed information on nutrient dynamics in the field were also obtained by an experiment. The results obtained will greatly contribute to the establishment of a proper fertilizer management in the area.