“…Many techniques used in traditional soil cultivation are applicable to soilless cultivation, mainly differentiating planting density, water and nutritional management (Kritzinger, 2014;Voogt et al, 2014;Muñoz et al, 2016;Silber and Bar-Tal, 2019;Kingston et al, 2020). Among the nutritional management, the source of N is highlighted stands out, due to its acidophilic or calcifuge nature, and that responds positively to the application of ammoniacal sources (Imler et al, 2019;Leal-Ayala et al, 2021;Tamir et al, 2021;Xu et al, 2021;Yuan-Yuan et al, 2021), and the use of technologies that allow the ammonium ionic species to be kept active within the substrate, such as the use of nitrification inhibitors (Osorio et al, 2020). For the correct nutritional management of blueberries grown in soilless medium, guidelines must be developed (Guo et al, 2021;Schreiber and Nunez, 2021), considering the differences in varietal behavior, both in nutritional needs and nutrient concentrations of plant tissue (Kritzinger, 2014;Strik and Vance, 2015;Muñoz et al, 2016;Fang et al, 2017;Kingston et al, 2020).…”