Abstract
Three experiments conducted in the Murrumbidgee Irrigation Area of southern New South Wales examined the influence of plant population on the yield and yield components of irrigated sunflowers. Populations ranged from 25,000 plants ha-1 to 140,000 plants ha-1. Furrow irrigation was employed with rows spaced 76 cm apart. In two of the experiments the wide range of plant populations examined had little effect on seed yield. Individual seed weight (g 1000-1) and seed number per head interacted with plant population so that seed yield was only marginally affected. In the remaining experiment, insufficient total dry matter production without improved harvest index prevented the attainment of an acceptable seed yield. There was a consistent trend for harvest index to fall with increasing plant population. Values recorded ranged from 0.36 to 0.23. Plant population had little effect on oil percentage. A plant population of 50,000 plants ha-1 is suggested as a minimum recommendation for irrigated sunflowers in southern New South Wales.
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Claims 6
Claim · model-written summary
Plant population had little effect on seed yield in two experiments.
- Taxon
- sunflower
Helianthus annuust0 - Treatment
- plant populationse0
- Outcome
- seed yielde0
- Direction
- little effecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In two of the experiments the wide range of plant populations examined had little effect on seed yield.”
t0“sunflower”
Claim · model-written summary
Seed weight and seed number per head interacted with population, leaving seed yield marginally affected.
- Taxon
- sunflowerHelianthus annuust0
- Organ / stage
- seed weighte0
- Outcome
- seed yielde0
- Direction
- marginally affectede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Individual seed weight (g 1000-1) and seed number per head interacted with plant population so that seed yield was only marginally affected.”
t0“sunflower”
Claim · model-written summary
Insufficient dry matter production without a better harvest index prevented acceptable yield in one experiment.
- Taxon
- sunflowerHelianthus annuust0
- Outcome
- acceptable seed yielde0
- Qualifier
- insufficient total dry matter production without improved harvest indexe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In the remaining experiment, insufficient total dry matter production without improved harvest index prevented the attainment of an acceptable seed yield.”
t0“sunflower”
Claim · model-written summary
Harvest index tended to fall as plant population increased.
- Taxon
- sunflowerHelianthus annuust0
- Treatment
- increasing plant populatione0
- Outcome
- harvest indexe0
- Direction
- falle0
- Value
- 0.36 to 0.23e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“There was a consistent trend for harvest index to fall with increasing plant population. Values recorded ranged from 0.36 to 0.23.”
t0“sunflower”
Claim · model-written summary
Plant population had little effect on oil percentage.
- Taxon
- sunflowerHelianthus annuust0
- Treatment
- Plant populatione0
- Outcome
- oil percentagee0
- Direction
- little effecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Plant population had little effect on oil percentage.”
t0“sunflower”
Claim · model-written summary
At least 50,000 plants per hectare was recommended for irrigated sunflower in southern New South Wales.
- Taxon
- sunflowers
Helianthuse0 - Outcome
- 50,000 plants ha-1e0
- Setting
- southern New South Walese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A plant population of 50,000 plants ha-1 is suggested as a minimum recommendation for irrigated sunflowers in southern New South Wales.”
The same questions in other papers
density · quality: oil · Helianthus annuus (common sunflower)Positive and negative results
6 papers in the same direction as this paper · 18 in the opposite direction
- positive
- positive
- positive
21 papers more in this group
See all 25 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.