This study was conducted on an apricot orchard in Gradarasha Field Agricultural college Salahaddin university during 2013 -2014 growth season to investigate the effect of some organic fertilizers on growth and yield of apricot trees "Prunus armeniaca L." c.v Royal. The study focused on studying the effect of some organic liquid fertilizers and compound fertilizer application on the growth and yield of apricot trees with two factors: Three types of liquid organic fertilizer application (Humi Max, NutriGreen and Vit-Org) each at two concentrations (15 and 30 ml.L-1) while NPK compound fertilizer was used as control for comparison.
Doses of organic fertilizers application that, were applied either at the beginning of flowering, or at two times, beginning of flowering and fruit development, where the amounts of these organic fertilizers and compound fertilizers were divided to two equal quantities. The experiments were designed according to completely randomized block design with four replications and using one tree as experimental unit, While means were compared using Duncan Multiple Range Test at 5% of probability. The best treatment was Humi Max fertilizer with concentration of 30 ml.L-1 for two doses applications recorded higher concentrations of N and P concentration in leaves at first season, while it lead to high concentrations of P and K in during second season. The best treatment was the one doses application of 30 ml.L-1 of NutriGreen at the first season which gave the highest means of number of fruit remaining on the trees at harvesting and single of tree yield at both seasons.