Compared to fixed spray nozzles, multistream multitrajectory rotaries:

• A. Have higher precipitation rate and worse distribution
• B. Have the same distribution uniformity as fixed nozzles
• C. Have lower precipitation rate and better distribution uniformity
• D. Cannot be used in landscape irrigation

Answer: (C)

The main idea is how water is delivered differently by rotating multi-stream heads versus fixed spray heads. Multistream multitrajectory rotaries break the flow into several small streams that sweep across the area as the head turns, which lowers the amount of water hitting the ground at any one moment. That lower precipitation rate, combined with the overlapping trajectories from the rotating pattern, yields more uniform coverage across the landscape and reduces dry spots and overspray. In contrast, fixed spray heads tend to deliver water more quickly in a single pattern, which can create hotspots and less even distribution. They’re not limited to special cases; rotaries are widely used in landscapes because they offer that improved uniformity with a gentler, slower application. So saying they have a lower precipitation rate and better distribution uniformity matches how these heads are designed to perform.