About KUBOTERA HIDEO
About 農研機構 中央農業研究セ
About 土づくりとエコ農業
About potato
About common scab
About soil acidity
About Streptomyces
About soil test
About growth inhibition
About pH
About potassium chloride
About pH measurement
About simplified method
About generation control
About Tubers(=corms)
About Plant diseases caused by bacteria
About Soil chemistry
About バレイショ
About そうか病
About 対策
About 土壌
About 酸性
About 簡易
About 診断
About 手法