IWA Publishing

Reuse: Agriculture

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Agronomic and water quality considerations

Water use for agricultural irrigation is the largest component of water use in most countries and is more than 70% of human water use in drier countries. Use of recycled water for irrigation requires consideration of soil types, groundwater levels, soil and water chemistry, nutrient loads, limits on chemicals, the salt tolerance of crops, the leaching of salts, and management of drainage water.

Various crops can be irrigated with recycled water. The water quality required depends on the crop type and the irrigation method. Higher quality recycled water is required for irrigation of crops which are eaten uncooked.

has provided a convenient use for recycled water and avoided the need for more costly discharges to receiving waters.

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