Interference of common lambsquater (Chenopodium album) in wheat (Triticum aestivum) as influenced by nitrogen levels Dodamani B. M., Das T. K. Indian Agricultural Research Institute, New Delhi 110 012. Abstract A field experiment was conducted during 2006–07 and 2007–08 at, New Delhi to study the effect of different levels of common lambsquarter (Chenopodium album L.) infestation 0, 8, 16, 32, 64, 128 plants/m2, un-weeded control with common lambsquarter (CL), and un-weeded control without CL at different nitrogen levels (0, 60 and 120 kg/ha) on growth, yield and nitrogen uptake of wheat. Increase in CL density from 0 to 128 plants/m2 resulted in a significant reduction in wheat yield by 31 and 36%, respectively in first and second year. Increase in nitrogen level from 0 to 120 kg/ha, on the contrary, recorded an improvement in wheat yield by 13.9 and 18% and N uptake by 29.4 and 27.7%, respectively in the first and second year. Higher the infestation of CL, greater were the quantity of N removed and reduction in wheat yield. The highest N level (120 kg/ha) and CL density (128 plants/m2) resulted in a great reduction in wheat yield (8.3 to 9.9%). Therefore, under high density of CL in wheat, the nitrogen dose should be reduced to 60 kg/ha. Top Key words Chenopodium album, Nitrogen, Weed, Wheat. Top |