Vol. 11, Issue 8 (2022)

Author(s):
RY Arun, Syed Sadarunnisa, P Syam Sundar Reddy, Lalitha Kadiri and K Devaki

Abstract:
The nutrient uptake by tomato (Solanum lycopersicum L.) as influenced by tillage and weed management practices was studied with two main plots (conventional tillage and deep tillage) and six weed management practices (weedy check, weed free, metribuzin (pre-emergence) with one hand weeding at 45 DAT, oxyfluorfen (pre-emergence) with one hand weeding at 45 DAT, metribuzin (pre-emergence) + quizalofop ethyl (post-emergence) at 45 DAT, oxyfluorfen (pre-emergence) + quizalofop ethyl (post-emergence) at 45 DAT) in sub-plots. The deep tillage practice significantly increased the nutrient uptake by the crop as compared to conventional tillage. Weed-free treatment (S2) (N-160.84 kg ha^-1, P-65.82 kg ha^-1 and K-118.32 kg ha^-1) recorded significantly higher nutrient uptake. However, Weed-free treatment (S2) was on par with the herbicidal treatments metribuzin along with one hand weeding at 45 DAT (S3) (N-154.62 kg ha^-1, P-64.57 kg ha^-1 and K-116.00 kg ha^-1) and oxyfluorfen (pre-emergence) (0.15 kg/ha) + one hand weeding at 45 DAT (N-150.99 kg ha^-1, P-62.86 kg ha^-1 and K-114.76 kg ha^-1). The complete Weed-free condition in weed-free plot was directly corelated with nutrient uptake and reduced weed growth by metribuzin and oxyfluorfen in the initial growth stage and one hand weeding at 45 DAT thereafter reduced the weed growth drastically which in turn increased the nutrient uptake by tomato as compared to the herbicidal combination plots due to no effect of quizalofop ethyl on broad-leaved weeds and sedges.