The aimed of research to find was treatment organic matter (sugar cane bagas) and non non organic matter to water capacity of soil to soybean, to find the optimal soil moisture of the alfisol soil with organic matter (sugar cane bagas) and non-organic matter (sugar cane bagas) what are available to crop growth and yield. The results show that there is a significant interaction between the treatment of organic material and the water volume on the dry weight of the total of plant (the age is 2 weeks after planting), the ratio of wide leaf (the age is 2 and 4 weeks after planting), and the number of seeds. On the other hand, there is no interaction with other components. The treatment of water volume has real influence and it is really seen on all growth components and products except for the relative rapid growth of plant which has the weight of 100 seeds and harvest index. The best treatment of water volume is seen on the giving of water volume on field capacity and 500 ml. On the other hand, the treatments of organic matter tend to show a good result rather than without giving organic matter even though most of them are not real.