This study was conducted in one of the private orchards located in the Altun Kobri sub-district of Dibs district, about (20) km away from Kirkuk governorate, during the growing season (2020-2021). This is to study the effect of six levels of summer pruning, the first level (T1) without pruning, the second level (T2) removing the tops of the main branches after the decade, and the third level (T3) removing the tops of the main branches after the decade and the fourth level (T4) removing leaves and leaving (8) Leaves for each fruit cluster, the fifth level (T5) remove the leaves and leave (10) leaves for each fruit cluster, the sixth level (T6) remove the leaves and leave (12) leaves for each fruit cluster. And the addition of three levels of humic acid (zero, 20, 40) g. vine-1 and its symbol (H1, H2, H3) sequentially, in the growth and yield characteristics of grape vines of the olive variety, and it was added a week after the contract (25/5/2021). The experiment was carried out according to a randomized complete block design with three sectors.

This study was carried out in one of the private orchards, which are 20 km away from Kirkuk province in the Altun Kobri area, during the period from May 2021 to August 2021, to study the effect of fertilizing with humic acid at three levels (0, 20, 40) gm and spraying with fertilizer The nano NPK with four levels (0, 1.5, 2.5, 3.5) g.L-1 in some growth characteristics and the yield of apple trees of the local Ibrahimi variety. The experiment was designed according to the design of randomized complete blocks (RCBD), a factorial investigation that included three factors of humic acid and four factors of the compound fertilizer nano NPK and with three replications, the number of treatments in each sector (12) treatments, and with 36 trees included in this experiment, and the treatments were distributed randomly on the experimental units, and for analyzing the data we use the SAS program, and the Duncan polynomial test was adopted under the probability level of 5%. The results showed that the humic acid fertilization gave significant differences in the averages of the studied traits, as the treatment of humic fertilizer at the level (40) gave the highest rate in the following characteristics (the chlorophyll content of the leaves and the proportion of potassium and phosphorous in the leaves). In contrast, the treatment (20) gave the highest rate in Characteristics (the percentage of nitrogen in leaves and leaf area). As for the treatment of spraying with nanocomposite fertilizer with a concentration of (3500), it achieved the highest rate in the characteristics (the content of chlorophyll in the leaves and the percentage of nitrogen, phosphorous and potassium in the leaves), while it gave the concentration (2500) the highest rate in the leaf area. The results also showed that the binary interaction achieved significant differences in the studied traits, as treatment (40) of humic fertilizer and (3500) of the nano-complex fertilizer achieved the highest rate in most of the studied features, namely (leaf area, leaf content of chlorophyll and phosphorous percentage in leaves).