keywords: FRIN, growth, Nauclea diderrichii, plantation
This study examined the growth of Nauclea diderrichii plantation in Forestry Research Institute of Nigeria, Ibadan, Oyo State, Nigeria. Ten (10) plots of 10 by 20 m in dimension were randomly established using Simple Random Sampling Technique. Total enumeration was carried out and a total of 123 Nauclea diderrichii were measured. The parameters examined were Dbh and total height. The Dbh was measured at 1.3 m above the ground level using girthing tape while total height was measured with the use of Haga altimeter. Volume and basal area were also computed through the measured parameters (Dbh, Diameter at the middle and height). The result showed that plot 10 had the highest number of individual with 17 trees and the plot with the least number of individual is plot 3 with 7 trees. The result of this work showed that 7 years Nauclea diderrichii plantation had total volume and height of 1316.86 m and 91.75 mha–1 while basal area was 142.13 mha–1. The value obtained for basal area is an indication of a well-stocked plantation.