Lateral-Move Irrigation

1. A long sprinkler lateral is carried on a line of motor-driven, wheeled towers
2. The lateral is fed with pressurised water from a channel or a flexible hose connection
3. Sprinklers or drop nozzles along the lateral distribute water below and beside it
4. Guidance keeps the towers aligned as the whole lateral advances in a straight line
5. The machine travels the length of the field, then is repositioned or reversed for the next irrigation

Lateral-move and center-pivot systems share much of the same tower, drive, and sprinkler technology, but differ in geometry. A center pivot sweeps a circle and leaves the field corners unirrigated unless fitted with extra equipment, whereas a lateral-move machine travels straight and can cover a full rectangle, matching field boundaries more completely.

Lateral-move systems suit large, regularly shaped, relatively level fields where uniform coverage of the whole rectangle is valuable — for example broadacre vegetable, root, and cereal crops. They are commonly used where field layout and a reliable channel or main make straight-line travel practical, and where high application uniformity is a priority.

Lateral-move machines require a substantial capital investment and dependable water delivery along their path, and their straight-line travel needs level, obstacle-free fields. Application depth is governed by travel speed and nozzle configuration, and — as with any sprinkler system — matching applied water to crop demand through scheduling and, ideally, soil-moisture monitoring is what realises efficient water use.