TY - JOUR T1 - Plant biostimulants: physiological responses induced by protein hydrolyzed-based products and humic substances in plant metabolism JO - Scientia Agricola A1 - Nardi, Serenella A1 - Pizzeghello, Diego A1 - Schiavon, Michela A1 - Ertani, Andrea SN - 0103-9016 UL - 10.1590/0103-9016-2015-0006 VL - 73 Y1 - 2016 PB - Brazil ER -