عنوان مقاله [English]
Confidence to internal quality products plays an important role in the prosperity of the economy. So, for the effect of humic acids (external and internal) on the concentration of micro elements and some components of pistachio yield, an experiment was conducted in a complete block design with three replications. The main plot consisted of four types of humic acid (ordinary solid, Ferty Plus solid, Iranian liquid and American liquid humic acid (Humax) and subplot different application levels (zero, first level for solid 600 kg and liquid 40 liters and second level for solid 800 kg and liquid 60 Lha-1. In total, 36 ten-year-old pistachio trees of almond cultivar were planted in Mehvalat. The results showed that the highest concentration of soil Fe was obtained from the application of 60 liters of Humax (77.3%) and 60 liters of Iranian liquid (75.5%) and the highest concentration of Zn (82.3%), Cu (15.4%) and Mn (46.5%) was obtained from the application of 60 liters per hectare of Humax. In the plant, the highest yield (74.3%), chlorophyll (17.7%), Zn (73.9%) and Mn (54.5%) concentration of leaves were observed from 60 liters per hectare of Humax and the highest concentration of Cu from 60 liters of Iranian liquid (58.9%) and 800 kg per hectare of solid Ferty Plus (55.5%). According to the findings of this study, internal humic acids are almost as good as external Humax, and by relying on internal knowledge, unnecessary currency outflow can be prevented and high performance can be achieved.