Soil ph based on amount of H and OH. Balancing of acid and base. alkaline level, acidity level for agriculture premium vector by Budi_Sudarmanto

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color red blue number field environment garden growth water icon acid farm agriculture measure measurement test balance scale concentration environmental biology chemical laboratory science gardening farming solution strip neutral soil base ground chemistry level meter control growing analysis value check basic indicator alkaline acidic hydrogen acidity litmus ph alkali ph scale

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