Humus wani abu ne mai duhu-launin ruwan kasa, amorphous, nau'in halitta mai tarwatsewa tare da babban nauyin kwayoyin halitta wanda yake da wahala. An kafa ta ne daga ruɓewar jiki, sinadarai, da ƙananan ƙwayoyin cuta da kuma canza ragowar dabbobi da shuka. Saboda haka, yana samuwa a cikin ƙasa mai yawa a cikin ƙasa, peat, lignite, ruwa da laka. Babban abubuwan da ke aiki a cikin humus sune humic acid da fulvic acid, kuma sun ƙunshi ɗan ƙaramin adadin humin. Da yake humic acid yana narkewa a cikin alkali amma ba a cikin acid ba, fulvic acid yana narkewa a cikin acid da alkali, kuma humus ba ya narkewa a cikin acid da alkali, HM kuma ba ya narkewa a cikin acid da alkali. , don haka za a iya raba su kuma a tsarkake su zuwa wani matsayi ta hanyar solubility. Humic acid shine macromolecular Organic acid wanda ya ƙunshi ƙamshi da ƙungiyoyin aiki daban-daban. Yana da babban reactivity kuma ana amfani dashi sosai a aikin noma, magani da kare muhalli da sauran fannoni.