Effect of agroforestry system on yield attributes of wheat (Triticum aestivum L.) under shallow water table conditions

Fifteen tree rows of Eucalyptus tereticornis were planted at G.B. Pant University of Agriculture and Technology, Pant Nagar, located in tarai region of Uttaranchal in a Nelder fan design in March 1989 at the angle of 24° from each other starting from north in anticlockwise direction. Area per tree was 30 m². Wheat was intercropped with Eucalyptus tereticornis on 21^st November, 1996. Each row of trees was one treatment. There were 15 treatments with control as sole crop. Various yield attributes, net radiation and water table depth were measured below trees and in control, simultaneously. In treatments 7,8,9,10 and 12 early vegetative growth was observed belwo trees. Higher yield attributing characters were also observed in some of the treatments below trees. In general, treatment 9 (192–216°) gave better yield attributes than that of control.