👉 Trellacy, also known as a trellis or a trellis system, is a type of irrigation system used in agriculture. In this system, water is directed to multiple locations on a plant's stem, typically at an angle so that water can be distributed evenly and efficiently throughout the plant. The term "trellacy" comes from the fact that it resembles a trellis, which is a structure used for vine cultivation or for spreading plants over soil. The system uses vertical