Chlorination must be used routinely to kill algae and loosen bonded organic matter within an irrigation system. Liquid sodium hydrochloride is the recommended chlorine source and it is injected into the system during regular operation, usually using the fertigation equipment (provided it is chlorine tolerant). Application is either continuous (a low dose rate) or intermittent (a high dose rate). The chlorine is never permitted to run through to plants or root systems (as it will kill them). It is always done as a separate flush of the system — not coming in contact with crops. 

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