  We show that plasma fixed nitrogen (PFN) as a biostimulant can improve
marketable lettuce yield following delayed harvest. Using just one-tenth of the
conventional nitrogen, PFN, generated by a dielectric barrier discharge over
water, was field-tested against traditional fertilization methods. PFN
increased marketable lettuce yield by 250% over conventional growing methods
despite reducing applied nitrogen fertilizer. Our study suggests that PFN can
increase marketable lettuce yield following delayed harvest while ensuring
environmental sustainability and product quality.
