The effect of two levels of electrical conductivity (EC) at 2.2 dS/m-1 and 4.4 dS/m-1 in two nutrient solutions was studied in a hydroponic culture of zucchini Cucurbita pepo var. Abodanza, during the growing period in a heated glasshouse. The experimental premises consisted of 8 double sloping benches (10x 0.4 x 0.6 m), which were by two equipped for the collection of the runoff with a calibra…