This study was conducted in one of the private orchards It is located at latitude 35.53°
and longitude 44.38° in Alton Kobri sub-district of Dibs district, about (20) km away
from Kirkuk governorate, during the growing season (2020-2021). 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 level Fourth (T4)
removing leaves and leaving (8) leaves for each fruit cluster, fifth level (T5) removing
leaves and leaving (10) leaves for each fruit cluster, sixth level (T6) removing leaves
and leaving (12) leaves for each fruit cluster. And the addition of three levels of humic
acid (0, 20 and 40) g. vine -1 and its symbol (H1, H2, H3) in sequence, 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. The results obtained can be
summarized as follows:
First: summer pruning
1- The T6 level (leaving 12 leaves for each cluster) outperformed the summer pruning
in the percentage of sugars, phenols and anthocyanins over the rest of the levels
(14.12%, 0.73%, 0.73%) respectively.
2- The T1 level (comparison) was superior to the acidity percentage of the grains
(0.41%) over the rest of the levels.
Second: Humic acid
1- The level 40 g. Vine-1 of humic acid was superior in the percentage of sugars,
phenols, and anthocyanin pigments in the kernels (13.07%, 0.57%, 0.66%)
respectively.
2- Not adding humic acid level 1 (the comparison) led to an increase in acidity in the
grains (0.36%).
Third: the interactions between the workers in the study.
1- The interaction of the study factors reached a significant level in the effect of all the
studied traits except for the weight of 100 grains. The interaction treatment (T6H3) was
distinguished that it increased the values and for all the traits except for the acidity in
the comparison treatment (T1H1).