Figure 5

Influence of the sole or combined application of humic acid & potassium sources in the carrot plants under full and limited irrigation levels on carrot yield (A) and Iwue- irrigation water use efficiency (B). The illustrated values in the figures are the average of the two growing seasons of 2019/2020 and 2020/2021. Vertical bars represent ± standard error (SE) of the means. Bars with different letters are statistically significant at p ≤ 0.05. Abbreviations: Control (spray with pure water); Hgd (applying humic acid as soil application); Hsp (applying humic acid as foliar spray applications); Kh (applying potassium humate as foliar spray applications); K₂SO₄ (applying potassium sulfate as foliar spray applications); 100 (applying 100% of gross irrigation water requirements); 80 (applying 80% of gross irrigation water requirements).