A breakaway joint of a boom arm assembly (108, 110) of an agricultural sprayer, comprising: a first boom segment with a first end and a second end the first boom segment defining a pivot axis at the second end; a second boom segment pivotally coupled to the first boom segment at the pivot axis; wherein, the first boom segment and the second boom segment are longitudinally aligned in a neutral position with a neutral axis; a bracket coupled to the first boom segment; a leaf spring coupled to the bracket between the first boom segment and the second boom segment, a cam coupled to the second boom segment and positioned adjacent to the leaf spring, wherein, in the neutral position the leaf spring contacts the cam at a first contact force, and in any position other than the neutral position the leaf spring contacts the cam at a contact force greater than the first contact force, wherein the bracket is sized to correspond with the leaf spring that is coupled to the bracket at a surface of the bracket facing the pivot axis, and wherein the bracket is a substantially planar plate having a defined thickness while the leaf spring is a substantially arc-shaped component having a varied cross-sectional dimension, so that in the neutral position and the leaf spring being coupled to the bracket, a center portion of the leaf spring is in contact with the bracket while a first and second leaf spring end (310, 312) is spaced from the bracket, wherein a first and second cam end (318, 320) are spaced from a first and second leaf spring end (310,312) when the second boom segment is in neutral alignment with the first boom segment; further wherein the breakaway joint is configured so that, when the second boom segment rotates in a first direction about the pivot axis, the first end of the cam contacts the first end of the leaf spring to apply a torque to the second boom segment about the pivot axis towards neutral alignment position. a first boom segment with a first end and a second end the first boom segment defining a pivot axis at the second end; a second boom segment pivotally coupled to the first boom segment at the pivot axis; wherein, the first boom segment and the second boom segment are longitudinally aligned in a neutral position with a neutral axis; a bracket coupled to the first boom segment; a leaf spring coupled to the bracket between the first boom segment and the second boom segment, a cam coupled to the second boom segment and positioned adjacent to the leaf spring, wherein, in the neutral position the leaf spring contacts the cam at a first contact force, and in any position other than the neutral position the leaf spring contacts the cam at a contact force greater than the first contact force, wherein the bracket is sized to correspond with the leaf spring that is coupled to the bracket at a surface of the bracket facing the pivot axis, and wherein the bracket is a substantially planar plate having a defined thickness while the leaf spring is a substantially arc-shaped component having a varied cross-sectional dimension, so that in the neutral position and the leaf spring being coupled to the bracket, a center portion of the leaf spring is in contact with the bracket while a first and second leaf spring end (310, 312) is spaced from the bracket, wherein a first and second cam end (318, 320) are spaced from a first and second leaf spring end (310,312) when the second boom segment is in neutral alignment with the first boom segment; further wherein the breakaway joint is configured so that, when the second boom segment rotates in a first direction about the pivot axis, the first end of the cam contacts the first end of the leaf spring to apply a torque to the second boom segment about the pivot axis towards neutral alignment position.