humic acid

listen to the pronunciation of humic acid
الإنجليزية - التركية
humik asit
hümik asit
الإنجليزية - الإنجليزية
a complex mixture of organic acids produced by the decomposition of vegetable matter
a dark brown humic substance that is soluble in water only at pH values greater than 2; "the half-life of humic acid is measured in centuries