A number of spikes from each district (Faisalabad, Gujranwala, and Sheikhupura) were found lower in control such as 7, 13, and 6 per panicle respectively. While in inhibitors treated samples number of spikes was counted as high when A1, A2, and A3 inhibitors applied. The maximum number of spikes in Faisalabad was 38 at 0.50% concentration (A3). While the highest number of spikes in Gujranwala and Sheikhupura treated soil were recorded as 47 and 8 at 25 and 0.50% urease inhibitory dose respectively when A3 inhibitor was used (see Table ).