Rail tuned pressure responsive irrigation emitter

A combination irrigation lateral and emitter, comprising:

• a lateral having a wall with an inner wall, at least a portion of the inner wall defining a lateral flow path;
• a continuous strip emitter having a first rail and a second rail operatively connected to the inner wall and a floor interconnecting distal ends of the first and second rails, the inner wall, the first and second rails, and the floor defining an emitter flow path, the emitter comprising:
• a pressure responsive section including portions of the floor, the first rail, and the second rail and including at least two features extending from the floor between the first and second rails, a first feature of the at least two features being tuned by at least a first tuning element to deflect along with the at least a portion of the floor and at least a portion of at least one of the first and second rails from a first first feature position to a second first feature position at a range of desired differential pressures local to the at least one feature, a second feature of the at least two features being tuned by at least a second tuning element different than the first tuning element to deflect along with at least a portion of the floor and at least a portion of at least one of the first and second rails from a first second feature position to a second second feature position at a range of desired differential pressures local to the second feature, the at least the first tuning element being different than the at least the second tuning element in a difference selected from the group consisting of a different type of tuning element, a different configuration of tuning element, a different dimension of tuning element, and a different combination of tuning elements, the tuning elements being selected from the group consisting of rail to rail distance, rail height, rail width, rail radius curvature, rail corner, vertical rail gap, transverse rail gap, external rail, floor thickness, floor profile, tip height, tip clearance, feature density, feature contour, feature angle, and feature thickness, the floor and the first and second rails being subjected to the desired differential pressures, the tuning elements tuning the continuous strip emitter in response to pressure increases to create flow versus pressure responses with a desired range of discharge exponents to maintain a desired range of flows over a desired range of operating pressures;
• wherein the desired range of discharge exponents for the emitter is 0 to 0.7, wherein the desired range of operating pressures is 4 to 30 psi, and wherein the at least one feature deflects from the first position into a second position when the range of desired differential pressures is local to the at least one feature.