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Soil conservation of improved farmland using pumice soils
Kobayashi_Yoshimune [Farmland Infrastructure East Off., Okhotsk General Subprfectural Bureau, Hokkaido Gov.]
Takeuchi_Hitoshi [Farmland Infrastructure East Off., Okhotsk General Subprfectural Bureau, Hokkaido Gov.]
Kimura_Nobuyuki [Farmland Infrastructure East Off., Okhotsk General Subprfectural Bureau, Hokkaido Gov.]
Soma_Katsuyuki [E S General Laboratory Co., Ltd.]
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