Fig. 4. Simulated cumulative probability distribution of the difference in grain yield between the increased specific leaf area (SLA) trait and the normal SLA trait on (a) a sandy soil and (b) a clay soil for 0 (_{_______}), 60 (_{__ __ __ __}), and 150 (_{___ . ___ . ___}) kg N ha^-1 treatments at Wongan Hills, Western Australia. The vertical line (_...) represents zero.