Petri cov ntaub ntawv tais diav yeej muab faib ua ob pawg, feem ntau yog yas thiab iav. Iav tuaj yeem siv rau cov ntaub ntawv cog, microbial kab lis kev cai thiab kev coj ua raws li ntawm tsiaj tsiaj. Cov yas yuav ua tau ntawm polyethylene, pov tseg thiab ntau yam siv. Nws yog tsim rau kev sim inoculation, sau ntawv, thiab sib cais ntawm cov kab mob. Nws tuaj yeem siv rau kev cog cov khoom ntoo.
