2.4. Characteristics measured
The experiment was preceded by numerous tests of the same variants in greenhouse conditions by testing germination or growing plants in vegetative pots (Tanase et al., 2011a and Tanase et al., 2011b). The field experiment was performed over a period of 120 days from April to August, for two consecutive years (2010 and 2011), and was carried out in triplicates. The average value was reported. Tested solutions were the following: control – tap water, deuterium depleted water (DDW), deuterium depleted water in combination 1:1 with spruce bark extract with 191 mg GAE/L (DDW + SB), spruce bark extract with 130 mg GAE/L (SB1) and spruce bark extract with 191 mg GAE/L (SB2).