Humic acid (HA) bụ ngwaahịa kwụsiri ike nke ihe na-emebi emebi ma si otú a na-agbakọta na sistemụ gburugburu ebe obibi.Humic acid nwere ike irite uru na uto osisi site na chelating nri anaghị adị na pH.Anyị nyochara mmetụta HA na uto na nri micronutrient na ọka wit (Triticum aestivum L.) toro hydroponically.A na-atụnyere usoro ọgwụgwọ mgbọrọgwụ anọ: (i) 25 micromoles synthetic chelate N- (4-hydroxyethyl) ethylenediaminetriacetic acid (C10H18N2O7) (HEDTA na 0.25 mM C);(ii) 25 micromoles synthetic chelate na 4-morpholineethanesulfonic acid (C6H13N4S) (MES na 5 mM C) pH buffer;(iii) HA na 1 mM C na-enweghị chelate ma ọ bụ ihe nchekwa ihe;na (iv) enweghị chelate ma ọ bụ ihe nchekwa sịntetik.Enyere ezigbo Fe inorganic Fe (35 micromoles Fe3+) na ọgwụgwọ niile.Enweghị ọdịiche dị ịrịba ama na mkpokọta biomass ma ọ bụ mkpụrụ mkpụrụ n'etiti ọgwụgwọ, mana HA dị irè n'ịkwalite chlorosis interveinal akwukwo nke mere n'oge mmalite nke ọgwụgwọ na-adịghị edozi.Akwukwo-anụ ahụ Cu na Zn dị ntakịrị na ọgwụgwọ HEDTA na-enweghị chelate (NC), na-egosi HEDTA siri ike gbakọta nri ndị a, si otú a na-ebelata ọrụ ion n'efu na ya mere, bioavailability.Humic acid agbasaghị Zn dị ka ike na nhazi nha kemịkalụ kwadoro nsonaazụ ndị a.Nnwale titration gosiri na HA abụghị ihe nchekwa pH dị irè na 1 mM C, na ọkwa dị elu rụpụtara na HA-Ca na HA-Mg flocculation na ngwọta nri.
