Nozzle and sprinkler for center pivot end

A sprinkler nozzle for a sprinkler positioned at a distal end of a center pivot irrigation system, the center pivot irrigation system including a pivot pipe rotatably coupled with a center pivot and a plurality of sprinklers mounted along the pivot pipe, the sprinkler nozzle being cooperable with a deflector plate of the sprinkler and comprising:

• a connection part securable to the sprinkler;
• and
• a nozzle opening downstream of the connection part, the nozzle opening defining an outer end of a flow path before impacting the deflector plate, wherein the nozzle opening through which water flows before impacting the deflector plate is part-toroidal shaped and partially blocked or skewed to control water flow to portions of the deflector plate according to a desired wetted area such that a width of the nozzle opening varies circumferentially and flow through the nozzle opening is thereby not uniform across the nozzle opening, and wherein the part-toroidal shaped opening spans an arc less than 360 degrees,
• wherein the partially blocked or skewed part-toroidal shape of the nozzle opening is defined by a closed center portion having a radius, and wherein at least a portion of a radial width of the nozzle opening is greater than the radius of the closed center portion.