The impact of water scarcity is the greatest challenge to agricultural production. Over 1.2 billion people – 20 percent of the world’s population – live in areas where the limits of sustainable water use have already been reached or breached. These include many of the world’s breadbasket areas: the North China Plains, the Murray Darling River, the Colorado River and the Indus. To raise and keep up productivity, it will be necessary to deliver water to crops more efficiently and to increase yields per liter of water.
Agriculture is not only the world's largest water user today, but also the most subsidized and least efficient. Worldwide, the sector is facing the double challenge of having to increase output and decrease water use.
In the agriculture industry suspended solids can cause problems as they can accumulate in the irrigation systems. This happens when run-off is minimized or eliminated. This often occurs in closed-loop systems.