Eucalyptus acceptance in agroforestry is also based on its high timber value; the wood of eucalyptus is utilized in pulp, paper, Plywood and in packaging industry and any kind of construction work. Investigations of the interactions between trees and crops in traditional agroforestry studies in village muliaput, Durkaguda and Luhaba, District Koraput, Odisha, showed that the growth parameters of Eucalyptus decreased under the shade of Eucalyptus. Plant height found minimum at under the shade of Eucalyptus i.e., (56.63 cm, 102 cm, 111.91 cm) in 30 DAT, 60 DAT, 90 DAT and the control was maximum (65.7 cm, 105.36 cm and 118.47 cm) in 30 DAT, 60 DAT, 90 DAT. Number of effective tillers per meter of row length at harvest was found maximum (27.03) at control and minimum (23.56) at under the shade of Eucalyptus. Number of fingers per ear head at harvest was significantly highest in control (7.46) i.e. control condition and lowest in under shade of Eucalyptus (6.28). Length of finger at harvest was found maximum (7.12 cm) at control and minimum (5.72 cm) at under the shade of Eucalyptus. The grain yield (2438 kg ha-1 & straw yield (7011 kg ha-1) significantly highest at control and lowest grain yield (2313 kg ha-1) & straw yield (6365 kg ha-1) under the shade of Eucalyptus because the plant species under the agroforestry system depends on the same supply of growth and development resources, such as light, water, nutrients and thus the performance of the other components as well as the system as a whole will impact one component of the system. It is reasonable to believe that the decline may be related to the reduced availability of light together along with competition. But On the other way Eucalyptus tree gives extra income to the farmers after harvesting the tree crop.