About CHIDA TOMOYUKI
About 宮城県古川農試
About IWASA IKUO
About 宮城県古川農試
About KANMURI HIDEAKI
About 宮城県古川農試
About CHIBA KATSUMI
About 宮城県古川農試
About 宮城県古川農業試験場研究報告
About paddy field
About rotation from paddy to other crop
About rice hull
About underdrain
About soil amendment
About dry field
About humification
About plowsole
About mud
About water permeability
About Glycine max
About underdrainage
About hydrophobic material
About warm period
About paddy water
About Agricultural engineering
About Crop cultivation in general
About Soil science in general
About 輪
About 疎水材
About もみ殻
About 暗渠
About 排水