| Abstrakt: |
The layout of the current research study was RCBD with three replications conducted at Bakrajo, Sulaimani, Kurdistan, with silty clay soil texture. The main objective of this research study was to demonstrate the effect of different rates of foliar humic acid (HAR) application and different planting times (PT) on soybean yield and yield components. Five different rates of foliar humic acid were applied once, including: (0 (as control), 2 g/L, 4 g/L, 6 g/L, and 8 g/L), along with two different planting times, PT 1 on May 15th, 2022, and PT 2 on June 1st, 2022. The foliar applications of HAR had a highly significant impact on the following parameters: Pod No. Plant-1, Empty Pod Plant-1, Grain Weight Plant-1(g), and Yield (kg ha-1), and a significant impact on the Thousand Grain Weight (g). However, the effect of planting time was highly significant only for Pod No. Plant-1 and had no significant effect on the other parameters, including Empty Pod Plant-1, Grain No. Pod-1, Thousand Grain Weight (g), Grain Weight Plant-1 (g), and Yield (kg ha-1). The highest values for Pod No Plant-1, Empty Pod Plant-1, Grain Weight Plant-1 (g), and Yield (kg ha-1), and significant values for the Thousand Grain Weight (g), were observed under the foliar application of 6 g/L HAR. Additionally, the best planting time for sowing soybeans was PT 1 on the 15th of May. [ABSTRACT FROM AUTHOR] |
