Claim · model-written summary
At low nitrogen, weeds were more problematic under no-till than conventional and minimum tillage.
- Taxon
- Sunflower
Helianthus annuust0 - Treatment
- NTe0
- Interactor
- weedse0weed
- Outcome
- weedse0
- Direction
- more problematice0
- Comparator
- CT and MT plotse0
Not reportedMaterialGeneCompoundOrgan / stageSecond interactorSecond interactor roleSettingValueQualifier
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“At the lowest N rate, weeds were more problematic in NT than in CT and MT plots”
t0“Sunflower”
Title
Ardell D. Halvorson; Alfred L. Black; Joseph M. Krupinsky; et al. Agronomy Journal 1999. doi:10.2134/agronj1999.914637x
Other claims from this paper (9)
- Intervention effect Minimum tillage yielded 1550 kg ha −1 sunflower seed, exceeding no-till and conventional tillage.
- Intervention effect Increasing nitrogen above 34 kg N ha −1 generally increased yield, varying by year.
- Intervention effect No-till at 101 kg N ha −1 produced a highest seed yield of 1638 kg ha −1.
- Intervention effect Minimum tillage at 101 kg N ha −1 produced a highest seed yield of 1614 kg ha −1.
- Association Water below 350 mm greatly reduced sunflower yield potential compared with 350 to 500 mm.
- Association Water above 500 mm did not increase sunflower yield over 350 to 500 mm.
- Association Yield differences between cultivar maturity classes varied by year, tillage and nitrogen.
- Recommendation More nitrogen may be needed under no-till to optimize sunflower yield.
- Recommendation Annual sunflower cropping is feasible in the northern Great Plains with minimum or no tillage and adequate nitrogen.