SUSTAINABLE TILLAGE SYSTEM IN KOREA

摘要

In Korea, the tillage operation had been done with the reversible janggi or the single plow for tractor at the tillage depth of 15-18cm since 1980. However. there were many difficulties on tillage operations such as the poor drainage and air permeability, the low efficiency, worker's stress. To solve such difficulties and improve the performance of tillage operation, some sustainable tillage systems have been developed and distributed to Korean farmers; a row making tillage system with furrow ridge janggi, a combination tillage system with subsoil tillage blade and a subsoil tillage system with pressurized air injector. In this paper, three sustainable tillage systems developed in Korea were introduced briefly with the schematic figures, and their performances were analyzed and compared with the conventional tillage systems. Based on the test results for the systems, the row making tillage system with furrow ridge janggi could reverse furrows against its both sides and make precision leveling and mechanical transplanting possible. The combination tillage system with subsoil tillage blade could the drainage and air permeability of soil and increase the crop product by 10-16%, due to increase of the pore space ratio by about 4%. The subsoil tillage system with pressurized air injector could be very effective on bad soil in orchard that included a lot of plow pan. Also, the system accelerated the growth of crop roots and increased the root distribution in subsoil. As a sustainable tillage system, the developed systems reduced the energy input to and improve the efficiency of tillage operation.