النمو القطري لأشجار السبحبح Melia azidarach L. المنفردة في مدينة الموصل محمد عاصم سعيد العلي.

Abstract EN

This research has been done to obtain equations that can be used to estimate diameter growth of individual Melia azidarach L.

trees which can be used to improve and enhance administrative plans.

Data have been obtained from urban trees and other general in Mosul City in the north of Iraq, different ages of tree where included.

By using liner and non linear regression with statgraph statistical program, several equations have been prepared for diameter growth.

For comparison between the equations, A group of precision criteria have been used which are coefficient of determination (R2 ) , percentage of standard error (S.E.), and other criteria.

The result is the following equation : I = -27.5865 + 28.0506*(D)0.1 Where the value of coefficient of determination is (89.36) , and percentage of standard error is (0.71), and this indicate the precision of the equation and the ability to its application to estimate diameter growth , because the diameter at Brest height is easy measured variable and give good estimation and reliable measure for diameter growth of Melia azidarach L.

trees.