Humic acid; humic acid in dry powdered form; modified humic acid; modified humic acid salt; modified sodium salt; modified humic acid sodium salt; modified humic acid sodium salt in dry powdered form; modified potassium salt; modified humic acid potassium salt; modified humic acid potassium salt in dry powdered form; mixtures of modified humic acid and modified fulvic acids; compounds of humic and fulvic acids; compounds of modified humic and modified fulvic acids; humic acid or salt thereof ...