Kev siv av PH meter
PH test rau seedbeds, PH test rau alkaline av, PH test rau acidic xau, PH test rau coir av, PH test rau substrate xau, thiab lwm yam. Dav siv nyob rau hauv kev ua liaj ua teb ntau lawm, txiv hmab txiv ntoo seedling vaj, av tshawb fawb,
cog tsev cog khoom, thiab lwm yam.
