Calibration Of some Mathematical Models To Estimate Tree Height Of Pinus brutia Ten. In Site Of Kfardabeel Stand- Jableh

This study aimed to estimate the height of the Pinus brutia trees in Kafardabeel forested area- Jableh. Eight mathematical forms (Michailoff, Prodan, Petterson, Parabel, Korsun, Logarithmic, Freese, Chapman-Richards) were used. In 2015, the diameter of 330 trees at breast height (dbh) were measured, and only heights of 165 of them were taken. Measurements were carried out in 15 sample plots all over the study area to cover site variations in altitude, exhibition, gradient and density. Data were split into two parts: 116 tree (70%) were used for model constrction, while the remaining trees 49 tree (30%) were used for model validation. The Results showed that, Parabel had the highest value for the Coefficient of Determination (R²=0.53) and the lowest value of the relative accuracy (mx%) (17.665%). That means it was the the best model to calculate tree height using diameter at breast height. This model can help foresters in forest management planning for study area and similar sites.

Detection of fungi on (seeds; seedlings root's and soils) of cypressand pinespecies (brutia; canary and stone) in forest nursery

In this study a total of /14/ fungal genera have been isolated from seeds; seedlings roots and soilsofCypress and Pine species (brutia; canary and stone) samples brought from Hinnade's nursery, and it were: Alternaria; Rhizoctoni; Fusarium; Chaetomium; Mucor; Phythophtora; Rhizopus; Aspergillus; Penicillium; Cladosporium; Saccharomyces; Sordaria; Pytiumand Trichoderma. The first 12 genera were isolated from seeds. Alternaria andFusarium appeared on alldifferent types of plants with the highest frequency of the first genus 23.3% and 36.6% of the second one on cypress. The first 5 genera were isolated from seedlings roots in addition to genus Pythium. And also the Genus Fusariumwas frequented on all study types with high frequencies reached to 58.5%onbrutia.The genusRhizoctoniawas not isolated from seeds and roots of Cypress while it was isolated from seeds and roots of all species of pine./7/ fungal genera were isolated from seedlings soils three of it (Alternaria,Aspergillus,Fusarium) were isolated from the soils of all species of plants with the highest percentages of the first 68.97% on cypress's soil and 22.22% of the second from stone pine and 35.13%of the genusFusarium from brutia. The highest frequency was for genus Fusarium 35.13% on brutia. The genusPythium was onlyisolated from the seeds and soils of brutia pine.