Claim · model-written summary
All weed-free treatments yielded significantly more onion than fertilized weedy plots.
- Taxon
- onion
Allium cepat0 - Treatment
- weed‐free treatmentse0
- Interactor
- weede0weed
- Outcome
- onion yielde0
- Direction
- highere0
- Comparator
- fertilized, weedy plotse0
Not reportedMaterialGeneCompoundOrgan / stageSecond interactorSecond interactor roleSettingValueQualifier
Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Verbatim
t0“onion (Allium cepa L.)”
e0“All weed‐free treatments with or without fertilizer gave a significantly higher onion yield than any of the fertilized, weedy plots.”
Title
JAMAL R. QASEM Weed Biology and Management 2006. doi:10.1111/j.1445-6664.2006.00216.x
Other claims from this paper (15)
- Intervention effect Fertilizer in weedy plots significantly lowered onion yield versus unfertilized weedy plots.
- Intervention effect Fertilizer in weedy plots reduced onion bulb diameter versus unfertilized weedy plots.
- Association Weed competition rose with fertilizer rate.
- Association Onion yield reduction rose with fertilizer rate under weed competition.
- Observation Moderate fertilizer in weed-free plots gave the highest onion yield.
- Intervention effect Weed competition reduced onion growth, bulb yield and size across planting materials.
- Association Longer weed competition caused stronger effects, especially for direct-seeded onion.
- Observation Onion from bulbs or seedlings had better growth, bulb weight and number than direct-seeded onion.
- Observation Onion from bulbs or seedlings was more competitive than direct-seeded onion.
- Observation Significant onion growth reduction required 42 days of weed competition when propagated from bulbs or seedlings.
- Observation Significant onion growth reduction required 21 days of weed competition after direct seeding.
- Observation Bulb-grown onion tolerated weeds better than direct-seeded or transplanted onion.
- Observation Bulb-grown onion yielded more bulbs than direct-seeded or transplanted onion.
- Observation December was the best planting time for bulb- and seedling-grown onion in weed-free plots.
- Observation November was the best planting time for direct-seeded onion in weed-free plots.