Abstract
The effects of time of planting on irrigated sunflower were tested at Emerald during the 1969-70 and 1970-71 summer seasons. Plantings ranged from September to March. A growing degree day summation from a base of 0¦C (GDDo) was the most reliable index of commencement of flowering (cv. 5.7 per cent). Sunfola commenced flowering at 1331 ¦ 76 GDDo. In both seasons significantly higher seed and oil yields were obtained from a December planting (Seed yields 2628 kg ha-1 1969-70, 1808 kg ha-1 1970-71, oil yields 1025 kg ha-1 1969-70, 61 5 kg ha-1 1970-71). Lower yields at all times of planting in the second season were attributed to rust infection (Puccinia helianthi Schw) . A good correlation was obtained between oil quality (proportions of oleic and linoleic acids) and temperatures during the post flowering period. Oleic acid levels ranged from 12 to 48 per cent. Linoleic acid levels ranged from 39 to 73 per cent. Oil quality (per cent linoleic acid) improved with late sowing in association with lowered temperatures
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Claims 9
Claim · model-written summary
Growing degree days from a zero-degree base was the most reliable flowering index.
- Taxon
- sunflower
Helianthus annuust0 - Outcome
- most reliable index of commencement of floweringe0
- Value
- cv. 5.7 per cente0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A growing degree day summation from a base of 0¦C (GDDo) was the most reliable index of commencement of flowering (cv. 5.7 per cent).”
t0“sunflower”
Claim · model-written summary
Sunfola began flowering at 1331 plus or minus 76 GDDo.
- Taxon
- sunflowerHelianthus annuust0
- Material
- Sunfolae0
- Outcome
- commenced floweringe0
- Value
- 1331 ¦ 76 GDDoe0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Sunfola commenced flowering at 1331 ¦ 76 GDDo.”
t0“sunflower”
Claim · model-written summary
December sowing significantly increased seed yields in both seasons.
- Taxon
- sunflowerHelianthus annuust0
- Treatment
- December plantinge0
- Outcome
- seed yieldse0
- Direction
- highere0
- Value
- 2628 kg ha-1 1969-70, 1808 kg ha-1 1970-71e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In both seasons significantly higher seed and oil yields were obtained from a December planting (Seed yields 2628 kg ha-1 1969-70, 1808 kg ha-1 1970-71, oil yields 1025 kg ha-1 1969-70, 61 5 kg ha-1 1970-71).”
t0“sunflower”
Claim · model-written summary
December sowing significantly increased oil yields in both seasons.
- Taxon
- sunflowerHelianthus annuust0
- Treatment
- December plantinge0
- Outcome
- oil yieldse0
- Direction
- highere0
- Value
- 1025 kg ha-1 1969-70, 61 5 kg ha-1 1970-71e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In both seasons significantly higher seed and oil yields were obtained from a December planting (Seed yields 2628 kg ha-1 1969-70, 1808 kg ha-1 1970-71, oil yields 1025 kg ha-1 1969-70, 61 5 kg ha-1 1970-71).”
t0“sunflower”
Claim · model-written summary
Lower second-season yields were attributed to rust infection.
- Taxon
- sunflowerHelianthus annuust0
- Interactor
- Puccinia helianthi Schw
Puccinia helianthie0pathogen - Outcome
- yieldse0
- Direction
- Lowere0
- Qualifier
- second seasone0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Lower yields at all times of planting in the second season were attributed to rust infection (Puccinia helianthi Schw) .”
t0“sunflower”
Claim · model-written summary
Postflowering temperatures correlated with oil quality.
- Taxon
- sunflowerHelianthus annuust0
- Outcome
- oil qualitye0
- Setting
- post flowering periode0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A good correlation was obtained between oil quality (proportions of oleic and linoleic acids) and temperatures during the post flowering period.”
t0“sunflower”
Claim · model-written summary
Oleic acid levels spanned 12 to 48 percent.
- Taxon
- sunflowerHelianthus annuust0
- Outcome
- Oleic acid levelse0
- Value
- 12 to 48 per cente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Oleic acid levels ranged from 12 to 48 per cent.”
t0“sunflower”
Claim · model-written summary
Linoleic acid levels spanned 39 to 73 percent.
- Taxon
- sunflowerHelianthus annuust0
- Outcome
- Linoleic acid levelse0
- Value
- 39 to 73 per cente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Linoleic acid levels ranged from 39 to 73 per cent.”
t0“sunflower”
Claim · model-written summary
Late sowing improved linoleic acid percentage alongside lower temperatures.
- Taxon
- sunflowerHelianthus annuust0
- Treatment
- late sowinge0
- Outcome
- Oil quality (per cent linoleic acid)e0
- Direction
- improvede0
- Qualifier
- lowered temperaturese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Oil quality (per cent linoleic acid) improved with late sowing in association with lowered temperatures”
t0“sunflower”
The same questions in other papers
sowing time · quality: oil · Helianthus annuus (common sunflower)Positive and negative results
13 papers in the same direction as this paper · 7 in the opposite direction
- negative
- negative
- negative
17 papers more in this group
See all 21 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.