Abstract

A study was conducted at the premises of Faculty of Agriculture, Forestry and Wildlife Nursery Plantation University of Maiduguri situated in Sahel Savannah ecological zone of Nigeria. The area is hot and dry for a greater part of the year. The vegetation is typically Sahel Savannah consisting of mainly grasses with few drought resistance trees, total counting was used in other to obtain appropriately result of the measurements. The research was aimed at determine the optimum level growth of trees, assessment of different parameters and volume of trees and ascertain used to reduced environmental desertification. The species of trees assessed were Neem, Khaya and Gmelina, the measurement taken were DBH, Basal Area, Total height, Merchantable height, Bole height, Crown depth having mean values of 21.42 m, 404.73 m2, 9.24 m, 1.71 m, 1.74 m and 7.5 m for Neem, khaya: 6.69 m, 35.27 m2, 4.53 m, 1.91 m, 2.69 m and 2.87 m. Gmelina: 27.58 m, 599.61 m2, 10.93 m, 1.69 m, 2.40 m and 8.58 m respectively and volumes for Neem, Khaya and Gmelina were 34.20 m3, 19.87 m3 and 30.03 m3 respectively. From the result obtained, it was observed that Azadiracta grow higher and has larger volume than other species, followed by Gmelina and Khaya in terms of volumes. In terms of mean DBH, Basal Area, Total height, Merchantable height, Bole height and crown dept obtained on the tree species Gmelina has the highest in terms of the determination of the measured followed by Neem and Khaya obtained from the results. There is need for World Bank to partner Nigerian Government and with forestry and wildlife department for the inventory of specific trees within the sub-region and also highlight the public to grow specific tree to reduce desertification within the savannah region of the Nigerian. This indicates that Azadiracta indica (Neem) species grow very well in region for afforestation also Khaya and Gmelina are used as anti-desertification control properties and as a good Carbon-dioxide Sink.

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