About KOSAKA HIDEKAZU
About ISHIZUKA SHINJI
About 秋田工業高等専門学校研究紀要
About humic acid
About extraction
About quantitative analysis (analytical chemistry)
About soil amendment
About lime
About Calcium
About hydration
About hardening
About organic solvent
About pH dependence
About solubility (ratio)
About Soil chemistry
About 土壌
About フミン酸
About 定量