Abstract
Studies at Hyderabad, India, and Swift Current, Saskatchewan, Canada, have shown that sunflower (Helianthus annuus L.) can be grown under dryland conditions over a wide range of plant populations and row spacings. At Hyderabad, yield plateaus of approximately 900 and 1,350 kg/ha existed over population ranges of 18,000 to 32,000 and 56,000 to 98,000 plants/ha, respectively. At Swift Current, yields from a 25,000 plants/ha population were 28% higher than those of a 125,000. plants/ha population, but were not significantly different from the mid-range 75,000 plants/ha. Population also influenced growth characteristics such as plant height and stem diameter and the rates of development. The crop showed a remarkable tolerance to drought and the ability to recover after periods of extreme moisture stress. Populations of 60,000 to 75,000 plants/ha at row spacings of 35 to 60 cm are recommended for dryland production.
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Claims 9
Claim · model-written summary
Sunflower grew under dryland conditions across a wide population and spacing range.
- Taxon
- sunflower
Helianthus annuuse0 - Outcome
- can be grown under dryland conditionse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“sunflower (Helianthus annuus L.) can be grown under dryland conditions over a wide range of plant populations and row spacings”
Claim · model-written summary
Hyderabad yield plateaued near 900 kg/ha at 18,000 to 32,000 plants/ha.
- Taxon
- sunflowerHelianthus annuust0
- Treatment
- 18,000 to 32,000e0
- Outcome
- yield plateause0
- Value
- 900e0
- Setting
- Hyderabade0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“At Hyderabad, yield plateaus of approximately 900 and 1,350 kg/ha existed over population ranges of 18,000 to 32,000 and 56,000 to 98,000 plants/ha, respectively”
t0“SUNFLOWER”
e1“25,000 plants/ha population”
Claim · model-written summary
Hyderabad yield plateaued near 1,350 kg/ha at 56,000 to 98,000 plants/ha.
- Taxon
- sunflowerHelianthus annuust0
- Treatment
- 56,000 to 98,000 plants/hae0
- Outcome
- yield plateause0
- Value
- 1,350 kg/hae0
- Setting
- Hyderabade0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“At Hyderabad, yield plateaus of approximately 900 and 1,350 kg/ha existed over population ranges of 18,000 to 32,000 and 56,000 to 98,000 plants/ha, respectively”
t0“SUNFLOWER”
e1“25,000 plants/ha population”
Claim · model-written summary
At Swift Current, 25,000 plants/ha yielded 28% more than 125,000 plants/ha.
- Taxon
- sunflowerHelianthus annuust0
- Treatment
- 25,000 plants/hae1
- Outcome
- yieldse0
- Direction
- highere0
- Value
- 28%e0
- Comparator
- 125,000. plants/hae0
- Setting
- Swift Currente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“At Swift Current, yields from a 25,000 plants/ha population were 28% higher than those of a 125,000. plants/ha population”
t0“SUNFLOWER”
e1“25,000 plants/ha population”
Claim · model-written summary
At Swift Current, yield at 25,000 plants/ha was not significantly different from 75,000 plants/ha.
- Taxon
- sunflowerHelianthus annuust0
- Treatment
- 25,000 plants/hae1
- Outcome
- not significantly differente0
- Comparator
- 75,000 plants/hae0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“were not significantly different from the mid-range 75,000 plants/ha”
t0“SUNFLOWER”
e1“25,000 plants/ha population”
Claim · model-written summary
Population influenced sunflower height and stem diameter.
- Taxon
- sunflowerHelianthus annuust0
- Treatment
- Populatione0
- Outcome
- plant height and stem diametere0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Population also influenced growth characteristics such as plant height and stem diameter”
t0“SUNFLOWER”
e1“25,000 plants/ha population”
Claim · model-written summary
Population influenced rates of development.
- Taxon
- sunflowerHelianthus annuust0
- Treatment
- Populatione0
- Outcome
- rates of developmente0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Population also influenced growth characteristics such as plant height and stem diameter and the rates of development”
t0“SUNFLOWER”
e1“25,000 plants/ha population”
Claim · model-written summary
Sunflower tolerated drought and recovered after extreme moisture stress.
- Taxon
- sunflowerHelianthus annuust0
- Outcome
- tolerance to drought and the ability to recovere0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The crop showed a remarkable tolerance to drought and the ability to recover after periods of extreme moisture stress”
t0“SUNFLOWER”
e1“25,000 plants/ha population”
Claim · model-written summary
The authors recommend 60,000 to 75,000 plants/ha and 35 to 60 cm rows for dryland production.
- Taxon
- sunflowerHelianthus annuust0
- Outcome
- Populations of 60,000 to 75,000 plants/ha at row spacings of 35 to 60 cme0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Populations of 60,000 to 75,000 plants/ha at row spacings of 35 to 60 cm are recommended for dryland production”
t0“SUNFLOWER”
e1“25,000 plants/ha population”