Agronomy Degree Practice Exam

The sprayer nozzle that is specifically designed to penetrate the plant canopy and effectively cover the underside of leaves is the hollow cone nozzle. This type of nozzle produces a fine spray pattern that allows it to reach into dense vegetation, where it can distribute pesticides or fertilizers effectively on the foliage. The hollow cone shape facilitates better distribution of the spray in a targeted manner, ensuring that both the top surfaces and the important undersides of leaves receive coverage.

In contrast, flat fan nozzles produce a flat, wide spray pattern that is more suitable for herbicide applications and broad coverage on exposed surfaces rather than penetrating dense canopies. Jet band nozzles are typically used for banding applications, which does not involve covering the underside of leaves, while air injection nozzles mix air with the spray to enhance droplet coverage and drift minimization, but they do not specifically target the undersides of leaves in the same effective manner as hollow cone nozzles.