About GUPTA R D
About Himachal Pradesh Krishi Vishva Vidyalaya, Himachal Pradesh
About BHARDWAJ K K R
About Himachal Pradesh Krishi Vishva Vidyalaya, Himachal Pradesh
About Journal of the Indian Society of Soil Science
About forest soil
About Soil chemistry
About Forestry in general
About 針葉樹
About 落葉樹林
About 土壌
About 腐植
About 組成
About 腐植酸
About フルボ酸
About コロイド
About 挙動
About 分光学的性質