Post-emergence herbicide without nitrogen gave the highest weed control efficiency, 97.39, at 60 days after transplanting.

nitrogen · weed · Oryza sativa (rice)Positive and negative results

11 papers in the same direction as this claim · 17 in the opposite direction

This claim is about lacking the nutrient, so it counts the other way round here.

1. positive
   Skipping basal nitrogen lowered weed dry weight and nutrient depletion.

   Effect of nitrogen and weed management in direct-seeded rice (Oryza sativa) under upland conditions · 2001

   Opposite direction

2. positive
   Higher nitrogen significantly reduced weed dry matter relative to recommended nitrogen in both years.

   Influence of Nitrogen Levels and Plant Densities on the Growth and Development of Weeds in pansplanted Rice (Omsativa) · 2001 · compared with recommended N (120 kg ha−1)

   Opposite direction

3. positive
   USG in raised beds lowered weed infestation versus conventional prilled urea.

   Utilization of Urea Super Granule in Raised Bed Versus Prilled Urea in Conventional Flat Method for Transplanted Aman Rice (Oryza Sativa) · 2016 · compared with PU in conventional method

   Opposite direction

4. positive
   Nitrogen management by leaf colour chart LCC <5 gave the minimum weed index in direct-seeded rice.

   Leaf colour chart-based nitrogen and weed management impacts on weeds, yield and nutrient uptake in dry direct-seeded rice · 2020

   Opposite direction

5. positive
   The split-N schedule gave the lowest dry weight of associated weeds.

   Effect of Crop Establishment Methods, Weed Management and Splitting of N on Rice and Associated Weeds · 2003

   Opposite direction

6. positive
   The combined Sesbania Azolla, nitrogen and pretilachlor regime lowered weed density and dry weight.

   Sesbania, Azolla and herbicide use for weed management and optimizing yield in direct-seeded rice · 2021

   Opposite direction

7. positive
   Nitrogen at 120 and 150 kg/ha gave higher water control efficiency (WCE).

   Effect of nitrogen levels and weed management on weed flora and yield of direct-seeded rice (Oryza sativa) in southern part of Punjab · 2023

   Opposite direction

8. positive
   Nitrogen and phosphorus fertilizers significantly reduced weed density.

   Effect of long-term fertilization pattern on weed community diversity in rice field · 2014

   Opposite direction

20 papers more in this group

herbicide · weed · Oryza sativa (rice)Positive and negative results

578 papers in the same direction as this claim · 17 in the opposite direction · 7 reporting no difference from an alternative

1. negative
   Rice flatsedge control by herbicides was lower with residue than without.

   Interaction of Rice Residue and PRE Herbicides on Emergence and Biomass of Four Weed Species · 2012 · compared with absence of residue

   Opposite direction

2. no effect
   Imazosulfuron applied alone as preemergence did not control grassy weeds, broad leaved weeds or sedges in rice

   Effect of tank-mixed herbicides on weeds and transplanted rice (Oryza sativa L.) · 2012

   Opposite direction

3. negative
   Oxyfluorfen failed to control other weeds beyond 15 days after sowing.

   Stale Seedbed Technique for the Management of Sacciolepis interrupta in Semi-dry Rice · 2000

   Opposite direction

4. negative
   Weed nutrient uptake was highest with hand weeding at 20 and 40 days.

   Effect of irrigation and weed management practices on Nutrient uptake and Economics of production of Aerobic rice · 2013

   Opposite direction

5. negative
   Unweeded plots (UW) had the highest weed density among weed management modes.

   Effects of Water and Weed Management on the Weed Density, Grain Yield, and Water Productivity of Wet-seeded Rice · 2020 · compared with UW

   Opposite direction

6. no effect
   Blackgram herbicides did not influence weed flora and growth of subsequent rice.

   Effect of Herbicides on Weed Growth and Crop Performance in Rice-blackgram Cropping System · 2000

   Opposite direction

7. negative
   The highest weed density and dry weight were observed in the no weeding condition.

   Effect of weeding regime on the performance of boro rice cultivars · 2019

   Opposite direction

8. no effect
   Adding herbicide to mechanical weeding did not improve weed control efficiency or rice grain yield over two conoweeder passes.

   Mechanized weed management to enhance productivity and profitability in system of rice intensification · 2019 · compared with conoweeder twice on 15 and 30 DAT

   Opposite direction

594 papers more in this group