Indian Journal of Agronomy

  • Year: 2015
  • Volume: 60
  • Issue: 4

Effect of planting geometries and weed-management practices on weeds, crop performance and economics of direct-seeded aerobic rice (Oryza sativa)

  • Author:
  • Neeshu Joshi1, V.P. Singh2,, V.C. Dhyani3, S.P. Singh3
  • Total Page Count: 3
  • DOI:
  • Page Number: 614 to 616

1M. Sc. (Agriculture) Student, College of Agriculture, Govind Ballabh Pant University of Agriculture and Technology, Pantnagar, Uttarakhand, 263 145

Govind Ballabh Pant University of Agriculture and Technology, Pantnagar, Uttarakhand, 263 145

2Professor (Agronomy), College of Agriculture, Govind Ballabh Pant University of Agriculture and Technology, Pantnagar, Uttarakhand, 263 145

3Assistant Professor, (Agronomy), College of Agriculture, Govind Ballabh Pant University of Agriculture and Technology, Pantnagar, Uttarakhand, 263 145

Abstract

A field experiment was conducted in a factorial randomized block design during the rainy (kharif) season of 2013 at Pantnagar, Uttrakhand, to study the influence of different planting geometry and weed-management practices on weed and crop dynamics in direct seeded aerobic rice (Oryza sativa L.). Continuous drilling at 20 cm with pendimethalin as pre-and bispyribac-Na as post emergence herbicide supplemented with 1 hand-weeding 45 days after sowing provided excellent results. Echinochloa colona (2.04 +0.71) recorded the maximum summed dominance ratio. Among the planting geometries, continuous drilling at 20 cm and among weed-control practices, pendimethalin (1, 000 g a.i./ha) + bispyribac-Na (25 g a.i./ha) + 1-hand-weeding 45 days after sowing (DAS) provided the higher weed-control efficiency (87.4%), productivity (4.79 t/ha) and net benefit (40, 633/ha).

Keywords

Aerobic rice, Net benefit, Planting geometry, Summed dominance ratio, Weed control practices