Growth Performance of Mahogany (Swietenia macrophylla) Swietenia macrophyllaunder Different Soil Types in Northern Region f Karnataka

The present study was carried out with an objective of assessing growth performance of mahogany ( ) grown Swietenia macrophylla under different soil types of hilly zone of Karnataka.Mahogany plantations with an age gradation of 1, 2, 3, 4 year grown in black and red soils were selected for the study.Growth parameters such as height and girth at breast height were recorded at 12 months interval for a period of one year from January 2022.Growth attributes such as height, girth at breast height, basal area and volume of mahogany at initial stage and at 12 MASE (month after start of experiment) of mahogany differed significantly due to soil type and age gradation.Volume per hectare at initial stage and at 12 MASE was significantly higher in black soil than in red soil.Significantly higher tree volume was recorded in 4-year-old mahogany plantation at initial stage (18.25 m ) and at 12 MASE (40.55 m ).Interaction between soil type and age gradation had significant 3 3 influence on volume per hectare at initial and 12 MASE.The study concluded that growth performance of mahogany was superior in black soil in northern region of Karnataka.