About HOSOKAWA H
About National Agricultural Res. Center, Niigata, JPN
About ADACHI K
About National Agricultural Res. Center, Niigata, JPN
About ITOH K
About National Agricultural Res. Center, Niigata, JPN
About MATSUZAKI M
About National Agricultural Res. Center, Niigata, JPN
About deep tillage
About Machines for field operations
About Vegetables
About 質
About 粘質土
About ロータリー
About 耕うん
About うね