Search claims · PlantClaims

Associationobservedoriginal resultnegativemeasured

Claim · model-written summary

Lower grain yield was associated with 0.4 percent sodium in upper leaves at maturity.

Taxon: SUNFLOWERHelianthus annuust0
Organ / stage: upper leavese0
Compound: Nae0
Outcome: yield of the graine0
Direction: decreasee0
Value: 0.4 percente0

Verbatim

e0
“The decrease in the yield of the grain was associated with 0.4 percent Na in the upper leaves at the time of maturity”
✓ located verbatim in the source · abstract, characters 552–669

t0
“SUNFLOWER (Helianthus annus L.)”
✓ located verbatim in the source · title, characters 91–122

Title

EFFECT OF EXCHANGEABLE SODIUM PERCENTAGE ON THE GROWTH, YIELD, AND CHEMICAL COMPOSITION OF SUNFLOWER (Helianthus annus L.)

R. CHHABRA; S. B. SINGH; I. P. ABROL Soil Science 1979. doi:10.1097/00010694-197904000-00007

Other claims from this paper (14)

Association ESP above 16 delayed sunflower germination.
Association ESP above 16 reduced plant height and stem-to-leaves ratio.
Association High ESP delayed flower-head emergence but advanced maturity.
Association High ESP advanced maturity.
Association Grain yield was significantly lower at ESP 24.8 and higher.
Association Oil content of grain fell slightly at high ESP.
Association Oil yield per hectare decreased as ESP rose.
Association Plant sodium increased with ESP.
Association Plant calcium decreased with ESP.
Association ESP had no effect on plant magnesium or phosphorus content.
Association Leaf potassium at maturity increased with ESP.
Association Zinc decreased with soil ESP.
Association Iron increased with soil ESP.
Association Manganese was unaffected by soil ESP.

Observationobservedoriginal resultmeasured

Claim · model-written summary

Linoleic acid concentration correspondingly decreased.

Taxon: SunflowerHelianthus annuust0
Outcome: concentration of linoleic acide0
Direction: decreasee0

Verbatim

e0
“There was a corresponding decrease in the concentration of linoleic acid”
✓ located verbatim in the source · abstract, characters 1393–1465

t0
“Sunflower”
✓ located verbatim in the source · title, characters 39–48

Title

Yield, Oil Content, and Composition of Sunflower Grown at Multiple Locations in Mississippi

Valtcho D. Zheljazkov; Brady A. Vick; M. Wayne Ebelhar; et al. Agronomy Journal 2008. doi:10.2134/agronj2007.0253

Other claims from this paper (14)

Observation DKF3510 had highest seed yield at Stoneville, Newton and Verona 2.
Observation DKF2990 had lower seed yields at Stoneville and Verona 2.
Observation DKF3875 and DKF2990 had higher seed oil concentration of 43–47% at Stoneville and Verona 2.
Observation DKF3510 and DKF3901 had lower seed oil concentration of 40–44% at Stoneville and Verona 2.
Observation At Newton, DKF2990 had the highest oil concentration.
Observation At Newton, DKF3510 and DKF3901 had lower oil concentration.
Observation At Newton, DKF3875 had the lowest oil concentration.
Association Increasing nitrogen reduced sunflower seed oil concentration.
Association Increasing nitrogen increased sunflower seed yield.
Association Increasing nitrogen increased sunflower oil yield per area.
Observation Oleic acid concentration generally increased relative to planting seed across sites and hybrids.
Observation Sunflower oil yield ranged from 483 to 1388 L ha −1 across nitrogen treatments and sites.
Observation Calculated sunflower biodiesel oil per area ranged from 386 to 1110 L ha −1.
Recommendation Authors consider sunflower viable for cooking oil or biodiesel production in most of Mississippi.

Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

Foliar application of Mo tended to decrease oil and nitrogen content of sunflower seeds.

Taxon: SunflowerHelianthus annuust0
Treatment: foliar application of Moe3
Outcome: Oil and nitrogen content of sunflower seedse3
Direction: decreasee3

Not reportedComparator

Verbatim

t0
“Chemical Composition of Sunflower”
✓ located verbatim in the source · title, characters 105–138

e3
“Oil and nitrogen content of sunflower seeds were also more due to soil as well as foliar application of N and K, but foliar application of Mo tended to decrease them”
✓ located verbatim in the source · abstract, characters 191–356

Title

Effect of Soil and Foliar Application of Nitrogen, Potassium and Molybdenum on Oil Content and Yield and Chemical Composition of Sunflower

R.C. Samul; P. Bhattacharyya Journal of the Indian Society of Soil Science 1980

Other claims from this paper (9)

Intervention effect Soil application of nitrogen, potassium and molybdenum significantly increased oil yield and nitrogen uptake of sunflower.
Intervention effect Foliar application of N and K tended to increase oil yield of sunflower.
Intervention effect Soil and foliar application of N and K were associated with higher oil and nitrogen content of sunflower seeds.
Intervention effect Soil application of N depressed K content in seed and stalk of sunflower.
Intervention effect Foliar treatment of N increased K content of sunflower seed and stalk.
Intervention effect Soil application of K and Mo significantly increased total K uptake of sunflower over soil application of K without Mo.
Intervention effect Soil application of K and Mo significantly increased oil yield, total N and K uptake by seed of sunflower.
Intervention effect Foliar application of K along with Mo significantly depressed oil yield of sunflower relative to foliar application of K without Mo.
Intervention effect Foliar application of K along with Mo significantly depressed total N and K uptake of sunflower relative to foliar application of K without Mo.

Intervention effectobservedoriginal resultnegativesignificant (as stated)measured

Claim · model-written summary

Removing 25% of seeds under water stress significantly reduced seed yield by 40.1%.

Taxon: SunflowerHelianthus annuust0
Treatment: 25e0
Outcome: seed yielde0
Direction: decreasee0
Value: 40.1e0
Setting: water stresse1

Not reportedComparator

Verbatim

e0
“removal treatments of 25 and 50% of the seed caused a significant decrease in seed yield by 40.1 and 79.3%, respectively”
✓ located verbatim in the source · abstract, characters 997–1117

e1
“Under water stress conditions, none of the defoliation treatments caused a reduction in seed yield”
✓ located verbatim in the source · abstract, characters 889–987

t0
“Sunflower”
✓ located verbatim in the source · title, characters 39–48

Title

Impact of Source, Sink Manipulation on Sunflower Yield Physiology under Different Water Availability Conditions

Mojtaba Hassanzadehdelouei; Ahad Madani; Najmeh Yazdanparast Annals of Arid Zone 2023. doi:10.59512/aaz.2023.62.4.13

Other claims from this paper (7)

Intervention effect Removing 25% of head seeds under optimal irrigation did not reduce yield relative to control.
Intervention effect Other source and sink removal treatments under optimal irrigation decreased seed yield.
Intervention effect Removal of 50% of the head produced the maximum seed yield decrease of 62.2%.
Intervention effect Defoliation under water stress did not reduce seed yield.
Intervention effect Removing 50% of seeds under water stress significantly reduced seed yield by 79.3%.
Mechanism The authors interpret source strength at both canopy levels as limiting yield under optimal irrigation.
Mechanism The authors interpret sink capacity as severely limiting under water stress.

Intervention effectobservedoriginal resultmeasured

Claim · model-written summary

Oil percentage was an exception to the decrease under increased stress.

Taxon: SunflowerHelianthus annuust0
Treatment: increasing the stress from 80 to 140 mme0
Outcome: oil percentagee0
Comparator: 80e0

Not reportedDirection

Verbatim

e0
“by increasing the stress from 80 to 140 mm, all traits except oil percentage were decreased”
✓ located verbatim in the source · abstract, characters 572–663

t0
“Sunflower”
✓ located verbatim in the source · title, characters 72–81

Title

A Study About Drought Stress Effects on Grain Yield Components of Three Sunflower Cultivars

Mohammad Hadi Hemmati; Ali Soleymani International Journal of Advanced Biological and Biomedical Research 2014

Other claims from this paper (7)

Intervention effect Increasing stress from 80 to 140 mm decreased grain number, grain weight and grain yield.
Intervention effect Increasing stress decreased biological yield, harvest index and oil yield.
Intervention effect The 80 mm irrigation treatment had the highest grain and oil yields.
Observation Record had the highest yield at 80 and 100 mm.
Observation Sirena had the highest yield at 120 mm.
Observation Euroflore had the highest yield at 140 mm.
Recommendation The authors recommend Record for drought stress or dry farming.

Associationobservedoriginal resultnegativemeasured

Claim · model-written summary

Seed-yield decline was 8% per ECw unit versus 5% per ECe unit.

Taxon: sunflowerHelianthus annuust0
Outcome: percent seed yield decreasee0
Direction: highere0
Value: 8%e0
Qualifier: 5%e0
Comparator: electrical conductivity of saturated‐soil extracts, ECee0

Verbatim

e0
“The percent seed yield decrease was higher per unit increase in electrical conductivity of irrigation water, ECw (8%), than per unit increase in electrical conductivity of saturated‐soil extracts, ECe (5%)”
✓ located verbatim in the source · abstract, characters 977–1182

t0
“sunflower”
✓ located verbatim in the source · title, characters 62–71

Title

Influence of salt stress on seed yield and oil quality of two sunflower hybrids

R. Di Caterina; M.M. Giuliani; T. Rotunno; et al. Annals of Applied Biology 2007. doi:10.1111/j.1744-7348.2007.00165.x

Other claims from this paper (10)

Observation Tenor had higher sodium and magnesium but lower potassium than Carlos.
Observation Tenor had lower potassium than Carlos.
Observation The hybrids had no difference in chloride content.
Association Leaf sodium, potassium, chloride and Na/K ratio rose with salinity.
Intervention effect Seed weight, achene weight, seed count and oil yield significantly fell under salt stress.
Intervention effect Salt stress increased oleic acid in Tenor from 82.2% to 86.7%.
Intervention effect Salt stress increased oleic acid in Carlos from 21.8% to 27.3%.
Intervention effect Linoleic acid fell from 5.9% to 3% in Tenor.
Intervention effect Linoleic acid fell from 66% to 61.3% in Carlos.
Mechanism The results support possible oleate desaturase inhibition under salt stress.

Observationobservedoriginal resultmeasured

Claim · model-written summary

Changing density from 60 to 40 or 80 thousand/ha decreased yield by 0.02-0.14 t/ha.

Taxon: sunflowerHelianthus annuust0
Outcome: yielde0
Direction: decreasee0
Value: 0.02-0.14 t/hae0

Verbatim

e0
“Reducing the density of plants up to 40 or up to 80 thousand hectares led to a decrease in yield by 0.02-0.14 t/ha.”
✓ located verbatim in the source · abstract, characters 3662–3777

t0
“sunflower”
✓ located verbatim in the source · title, characters 16–25

Title

Productivity of sunflower depending on the plant stand density and the application of bio-fertilizers

Scientific and Technical Bulletin of the Institute of Oilseed Crops NAAS 2018. doi:10.36710/ioc-2018-26-08

Other claims from this paper (12)

Observation Sunflower biometric and performance indicators changed with density and biofertilizer.
Observation Height was greatest at 60 thousand/ha for the six sunflower hybrids.
Observation Leaf area per plant decreased as density rose from 40 to 80 thousand/ha.
Observation Leaf area per hectare was greatest at 60 thousand/ha.
Observation Thickening stands reduced 1000 seed mass across sunflower hybrids.
Observation The largest 1000 seed mass occurred with seed dressing at 40 thousand/ha.
Observation Seed treatment raised 1000 seed mass by 0.1-0.4 g.
Observation Yield was highest at 60 thousand/ha with seed pretreatment; Site reached 2.09 t/ha.
Observation Site was the most productive sunflower hybrid.
Observation Biofertilizer raised yield, with the largest increase at 60 thousand/ha.
Observation Biological fertilizer had no significant effect on seed fat content.
Observation Oil yield peaked at 60 thousand/ha with seed treatment.

Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

Dry matter yield decreased at 60 kg S/ha.

Taxon: sunflowerHelianthus annuust0
Treatment: 60 kg S/hae0
Outcome: dry-matter ylelde0
Direction: decreasee0

Not reportedComparator

Verbatim

e0
“Though there was decrease in dry-matter yleld at 60 kg S/ha, the S uptake increased with the increase in S level from 0 to 60 kg/ha.”
✓ located verbatim in the source · abstract, characters 672–804

t0
“sunflower”
✓ located verbatim in the source · title, characters 85–94

Title

Effect of source and level of sulphur on yield and sulphur content of plant parts of sunflower (Helianthus annuus)

B Sreeman Narayana; A. Sreenivasa Raju The Indian Journal of Agricultural Sciences 1994

Other claims from this paper (7)

Observation EC 68414 had the highest plant part yield under the tested sulphur sources.
Observation EC 68414 had the highest sulphur content.
Observation EC 68414 had the highest sulphur uptake.
Observation Sulphur content peaked in leaves at bud and flowering stages and in mature seeds.
Association Sulphur content decreased as the sunflower crop aged.
Intervention effect Sulphur uptake increased as sulphur application rose from zero to 60 kg/ha.
Recommendation The authors conclude that high leaf sulphur at budding and flowering is needed for optimum sunflower production.

Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

Seed yield per plot and its components declined gradually as available soil water decreased.

Taxon: sunflowerHelianthus annuust0
Treatment: decrease in amount of available water in the soile0
Outcome: seed yield/plot and its component mean valuese0
Direction: depressione0

Not reportedComparator

Verbatim

t0
“SUNFLOWER CULTIVARS”
✓ located verbatim in the source · title, characters 20–39

e0
“A gradual depression in seed yield/plot and its component mean values, parallel to the decrease in amount of available water in the soil was detected”
✓ located verbatim in the source · abstract, characters 1321–1470

Title

PERFORMANCE OF SOME SUNFLOWER CULTIVARS AS AFFECTED BY WATER IRRIGATION REGIMES

S. Esmail, Journal of Plant Production 2000. doi:10.21608/jpp.2000.258547

Other claims from this paper (19)

Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

Joint vegetation for at least 30 days reduced yield by 17.6-40.1%.

Taxon: sunflowerHelianthus annuust0
Treatment: joint vegetation of the crop and weeds for 30 or more dayse0
Interactor: weedse0weed
Outcome: yielde0
Direction: decreasee0
Value: 17.6-40.1%e0

Not reportedComparator

Verbatim

e0
“Continuation of joint vegetation of the crop and weeds for 30 or more days leads to a decrease in yield by 17.6-40.1%.”
✓ located verbatim in the source · abstract, characters 1036–1154

t0
“sunflower”
✓ located verbatim in the source · title, characters 46–55

Title

Competitive interaction between the plants of sunflower and weeds in agrocenosis

V. Zadorozhnyi; O. Chernelivska Feeds and Feed Production 2025. doi:10.31073/kormovyrobnytstvo202599-05

Other claims from this paper (15)

Observation Sunflower crop weeds comprised 15 species from 10 families.
Observation Dicotyledonous weeds represented 56.3% of infestation.
Observation Monocotyledonous weeds represented 43.7% of infestation.
Observation Chenopodium album constituted 42% of common weed species.
Observation Echinochloa crus-galli constituted 30% of common weed species.
Observation Setaria glauca constituted 13% of common weed species.
Observation Amaranthus retroflexus constituted 7% of common weed species.
Association Longer sunflower coexistence with weeds increased yield losses.
Intervention effect Weed destruction after 10 days resulted in 7.9% sunflower yield loss.
Intervention effect Weed destruction after 20 days resulted in 12.2% sunflower yield loss.
Intervention effect Whole-season weed coexistence caused sunflower yield losses of 47.7%, or 1.57 t/ha.
Observation Weed-free sunflower control seed yield was 3.29 t/ha.
Recommendation The most effective weed control period was the first 10-20 days.
Intervention effect Reducing joint vegetation from 60 to 10 days preserved yields of 1.97-3.03 t/ha.
Recommendation Even small weed-control delays can cause significant sunflower yield loss.

“yield decrease”

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