Abstract
This investigation was carried out to obtain some data for dirt of sawdust floor in fattening cattle barns. We observed and continued to recording the dirty degree of sawdust using the dirty number 1 to 4 for one year since april 1974.
The results obtained were summarized as follows:
1) The degrees of dirt of sawdust floor were shown in Fig. 8, and it was considered that cattle were able to be raised in the sawdust floor without supplying or changing sawdust for about 2 or 6 months.
2) The higher degree of dirt was observed in summer as compared to that in spring.
3) The favorable area per one cattle was found to be 6 to 10m2. Furthermore, sawdust-supplying should be required to the floor when the dirt of sawdust floor reached to “degree 4”.
