Effect of post-emergence herbicides on nutrient uptake by weeds and potato (Solatium tuberosum)

A field experiment was conducted during winter (mbi) seasons of 1995–96 and 1996–97 at Hisar, to study the effect of post-emergence herbicides on nutrient uptake by weeds and crop in potato (Solanum tuberosum L.). The field was dominated mainly by broad leaf weeds like Chenopodium album L. (50%), Melilotus alba Desr. (35%) and Coronopus didymus (15%). All the weed-control treatments significantly reduced the dry weight of weeds and N, P and K uptake by weeds compared with weedy check. Among herbicides, minimum nutrient uptake by weeds and maximum by crop was recorded in the plots treated with linuron + metribuzin (2: 1) at 1.00 kg/ha, and it also recorded highest tuber yield which was at par with weed-free check. The maximum nutrient uptake by weeds and minimum by crop with lowest tuber yield was found in weedy check, followed by glufosinate.