Abstract
Abstract Information on the effect of reduced tillage on sunflower ( Helianthus annuus L.) production with different hybrids is limited. A 3‐yr study (1984 to 1986) was undertaken to evaluate the effect of tillage system and weed control method on seed weight, yield, oil concentration, and total oil of early and late maturity sunflower hybrids under dryland conditions in North Dakota. Sunflower hybrids were grown on a Fargo clay soil (fine, montmorillonitic, frigid Vertic Haplaquolls) with established long term tillage plots. Tillage treatments included conventional (Plow) and three reduced tillage systems (Sweep, Intertill, and No‐till) with weed control provided by herbicides with and without cultivation. Yield, weight, oil concentration, and oil yield of the sunflower seed was not significantly different among tillage systems or between weed control methods. Hybrids performed similarly in the seed parameters measured, although the late maturity hybrid consistently produced smaller seed. Results from the study indicated that early maturity sunflower hybrids are better adapted to the dryland areas of the cool northern states because seed yield and quality, irrespective of tillage or weed control method, were equal to or better than those for late maturity hybrids.
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Claims 5
Claim · model-written summary
Seed yield, weight, oil concentration and oil yield did not differ significantly among tillage systems.
- Taxon
- sunflower
Helianthus annuuse0 - Treatment
- tillage systemse0
- Outcome
- Yield, weight, oil concentration, and oil yielde0
- Direction
- not significantly differente0
- Comparator
- tillage systemse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Yield, weight, oil concentration, and oil yield of the sunflower seed was not significantly different among tillage systems”
Claim · model-written summary
Those seed traits did not differ significantly between weed control methods.
- Taxon
- sunflowerHelianthus annuuse0
- Treatment
- weed control methodse0
- Outcome
- Yield, weight, oil concentration, and oil yielde0
- Direction
- not significantly differente0
- Comparator
- weed control methodse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Yield, weight, oil concentration, and oil yield of the sunflower seed was not significantly different among tillage systems or between weed control methods”
Claim · model-written summary
Hybrids performed similarly on measured seed parameters.
- Taxon
- sunflowerHelianthus annuust0
- Outcome
- seed parameters measurede0
- Direction
- similarlye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Hybrids performed similarly in the seed parameters measured”
t0“Sunflower”
Claim · model-written summary
The late maturity hybrid consistently produced smaller seeds.
- Taxon
- SunflowerHelianthus annuust0
- Material
- late maturity hybride0
- Outcome
- seede0
- Direction
- smallere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the late maturity hybrid consistently produced smaller seed”
t0“Sunflower”
Claim · model-written summary
The authors conclude early maturity hybrids are better adapted to dryland areas of cool northern states.
- Taxon
- sunflowerHelianthus annuuse0
- Material
- early maturity sunflower hybridse0
- Outcome
- early maturity sunflower hybrids are better adapted to the dryland areas of the cool northern statese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“early maturity sunflower hybrids are better adapted to the dryland areas of the cool northern states because seed yield and quality, irrespective of tillage or weed control method, were equal to or better than those for late maturity hybrids”
The same questions in other papers
tillage · quality: oil · Helianthus annuus (common sunflower)Positive and negative results
6 reporting no difference from an alternative
- positive
- positive
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See all 7 papers →herbicide · quality: oil · Helianthus annuus (common sunflower)Positive and negative results
5 papers in the same direction as this paper · 3 in the opposite direction
- positive
- positive
- positive
5 papers more in this group
See all 9 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.