ZABOLOTNA, A. V.; ZABOLOTNYI, O. I.; ROZBORSKA, L. V.; ZHILYAK, I. D.; DATSENKO, A. A. PIGMENT CONTENT AND NET PHOTOSYNTHETIC PRODUCTIVITY OF MAIZE WHEN USING PLANT GROWTH REGULATORS. Bulletin of Sumy National Agrarian University. The series: Agronomy and Biology, v. 46, n. 4, p. 9-15, 24 May 2022.