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Rh After the winter and early spring crops have been harvested the narrow ridges on which they are grown are turned into the furrows by means of their simple plow drawn by a heavy bullock, different from the cattle in China but closely similar to those in Japan. The fields are then flooded until they have the appearance seen in Fig. 12. Over these flooded ridges the green grass and oak boughs are spread, when the fields are again plowed and the material worked into the wet soil. If this working is not completely successful men enter the fields and tramp the surface until every twig and blade is submerged. The middle section in this illustration has been fitted and transplanted; in front of it and on the left are two other fields once plowed but not fertilized; those far to the right have had the green manure applied and the ground plowed a second time but not finished, and in the immediate foreground the grass and boughs have been scattered but the second plowing is not yet done.

Fig. 211.—General view across valley, showing Korean rice fields being transplanted, and in the foreground fertilized with green herbage from the hill lands.

We passed men and bullocks coming from the hill lands loaded with this green herbage and as we proceeded