{"id":2371,"date":"2020-03-06T03:20:53","date_gmt":"2020-03-06T03:20:53","guid":{"rendered":"http:\/\/agri-research-journal.net\/SjarEn\/?p=2371"},"modified":"2020-03-06T03:20:54","modified_gmt":"2020-03-06T03:20:54","slug":"height-diameter-models-of-pinus-brutia-ten-at-the-coastal-mountains-of-al-ghab-in-syria","status":"publish","type":"post","link":"https:\/\/agri-research-journal.net\/SjarEn\/?p=2371","title":{"rendered":"Height\u2013Diameter Models of Pinus brutia Ten. at the Coastal Mountains of Al-Ghab in Syria"},"content":{"rendered":"\n

Somar Khalil(1)<\/sup>\nAli Thabeet*(1)<\/sup> and Wadie kh<\/strong>ou<\/strong>ry(1)<\/sup><\/strong><\/p>\n\n\n\n

(1). Department of Forestry and Ecology,\nFaculty of Agriculture, University of Aleppo, Aleppo, Syria.<\/p>\n\n\n\n

(*Corresponding author: Dr. Ali Thabeet.\nE-Mail: alithabt@yahoo.fr).<\/p>\n\n\n\n

Received: 24\/11\/2018                                Accepted: 03\/01\/2019<\/p>\n\n\n\n

Abstract<\/strong><\/p>\n\n\n\n

This article included testing the height curves using\nsome statistical parameters i.e., absolute mean of model error, relative mean\nof model error %, absolute standard deviation of the mean model error, model\naccuracy, model accuracy % and coefficient of determination R2<\/sup>, to\nselect the best model to estimate the height of Pinus brutia<\/em> at the\ncoastal mountains of Al Ghab in Syria, depending on one easy variable, which\nwas the diameter of breast height. The objective of the study was to study\nheight\u2013diameter relationship as well as to obtain useful data in forest\nmanagement. Ten height curve models were tested viz. Michailoff, Parabel,\nProdan, Petterson, Korsun, Logarithmic, Pretzsch, Freese and Schreuder. The\ndata of 104 trees was divided to estimate\nmodel parameters (71 trees) and the data for evaluation the models (33 trees).\nThe results of model\u2019s efficiency showed the adoption of the logarithmic model.\nThis model had a high R-squared (R2<\/sup> = 93.38%), and the values of\naverage model error value of 0.06, model accuracy of 0.792, model error % was\n0.589 and standard deviation of model error was 0.529.<\/p>\n\n\n\n

Keywords:<\/strong> Pinus brutia, <\/em>Height curves, Growth modelling, Syria.<\/p>\n\n\n\n

Full Paper in Arabic: PDF<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

Somar Khalil(1) Ali Thabeet*(1) and Wadie khoury(1) (1). Department of Forestry and Ecology, Faculty of Agriculture, University of Aleppo, Aleppo, Syria. (*Corresponding author: Dr. Ali Thabeet. E-Mail: alithabt@yahoo.fr). Received: 24\/11\/2018                                Accepted: 03\/01\/2019 Abstract This article included testing the … Continue reading →<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[366,998],"tags":[1021,1020,1019],"class_list":["post-2371","post","type-post","status-publish","format-standard","hentry","category-forestry","category-v7n1-february-2020","tag-growth-modelling","tag-height-curves","tag-pinus-brutia"],"_links":{"self":[{"href":"https:\/\/agri-research-journal.net\/SjarEn\/index.php?rest_route=\/wp\/v2\/posts\/2371","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/agri-research-journal.net\/SjarEn\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/agri-research-journal.net\/SjarEn\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/agri-research-journal.net\/SjarEn\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/agri-research-journal.net\/SjarEn\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=2371"}],"version-history":[{"count":1,"href":"https:\/\/agri-research-journal.net\/SjarEn\/index.php?rest_route=\/wp\/v2\/posts\/2371\/revisions"}],"predecessor-version":[{"id":2372,"href":"https:\/\/agri-research-journal.net\/SjarEn\/index.php?rest_route=\/wp\/v2\/posts\/2371\/revisions\/2372"}],"wp:attachment":[{"href":"https:\/\/agri-research-journal.net\/SjarEn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=2371"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/agri-research-journal.net\/SjarEn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=2371"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/agri-research-journal.net\/SjarEn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=2371"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}