800-1200 snails are placed on 1 shield. Shields should cover at least 40, ideally 50% of the field area. In the sectors, the pallets are placed one after the other, in rows, according to the following principle: 2 pallets in a row next to each other, the distance between them is 60 cm, then the path on which the workers will walk, then again 2 pallets next to each other, and so on until the end of the row. The distance between these pairs of pallets in a row is 1.2 m, while the width of the paths in the sector is 60 cm, the rest is the area for perko. The distance between the rows of pallets is 30 cm. The width of the tracks between the sectors is 4 m.