Evaluation the Effects of Humic Acid Foliar Application on Potato Yield

The purpose of this research is to investigate the effects of humic acid foliar spraying on potato yield, which was conducted as an experiment in the form of a completely randomized design in three replications at Chahardehi Dopi, on the farm of Mirza Mohammad Qaim Khan Bittani. The use of humic acid was at four levels (0, 30, 40 and 50 ml/l). The results showed that the difference between humic acid levels in terms of yield was significant at the 1% probability level. The highest yield was related to the 50 ml/l humic acid treatment with 3883.46 kg/1000 m2 and the lowest was in the control treatment with 2912.16 kg/1000 m2 . According to these results, it is recommended to use a concentration of 50 ml/liter of humic acid compared to other treatments.