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“yield decrease”

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Mechanismauthor interpretationoriginal resultnegativemeasured

Claim · model-written summary

Drought-related yield decline was associated with fewer seeds per plant.

Taxon: soybeanGlycine maxe7
Outcome: decrease in yielde0
Qualifier: seed number per plante0

Verbatim

e0
“This decrease in yield is due to a decrease in pod number and seed number per plant”
✓ located verbatim in the source · abstract, characters 449–532

e7
“flower drop of the soybean (Glycine max [L.] Merr.) was studied”
✓ located verbatim in the source · abstract, characters 92–155

Title

Über den Einfluß von Trockenstreß in unterschiedlichen Entwicklungsphasen auf Wachstum, Blütenabwurf und Ertrag der Sojabohne (Glycine max [L.] Merr.)

M. Bartels; K. Caesar Journal of Agronomy and Crop Science 1987. doi:10.1111/j.1439-037x.1987.tb00283.x

Other claims from this paper (6)

Observation Calland and Williams did not differ in drought response.
Intervention effect Two weeks of drought reduced seed yield by about 18%.
Intervention effect Drought during seed filling cut yield by 25%.
Mechanism Drought-related yield decline was associated with fewer pods.
Intervention effect Drought did not affect main-stem flower drop.
Association Main-stem flower drop was unrelated to seed yield per plant.

Associationobservedoriginal resultmeasured

Claim · model-written summary

Propyzamide-associated increase in clover contribution accompanied a small decrease in total seasonal grass yield.

Taxon: White cloverTrifolium repense1
Treatment: propyzamide applicatione0
Outcome: total seasonal yield of grasse0
Direction: decreasese0

Verbatim

e0
“large increases in clover contribution following propyzamide application were accompanied by small decreases in total seasonal yield of grass”
✓ located verbatim in the source · abstract, characters 1559–1700

e1
“White clover”
✓ located verbatim in the source · abstract, characters 9–21

Title

Slot‐seeding investigations. 4. Effect of phosphate fertilizer and grass suppressant on the establishment and growth of white clover in permanent pasture

E. D. WILLIAMS; M. J. HAYES; R. J. HAGGAR Grass and Forage Science 1985. doi:10.1111/j.1365-2494.1985.tb01775.x

Other claims from this paper (13)

Association Fewer clover seedlings established on high-P plots with abundant Holcus and Alopecurus than P-deficient plots dominated by Agrostis and Festuca.
Intervention effect Phosphate in slots decreased establishing clover seedlings.
Intervention effect Growth increased most when phosphate was placed beneath the slot.
Observation Reapplying phosphate to previously supplied plots produced 7.2 g aboveground dry weight per row length.
Observation Reapplying phosphate to previously supplied plots produced 1.7 g stolon dry weight per row length.
Intervention effect Propyzamide greatly increased clover yield and contribution under high initial and applied P.
Observation Without propyzamide, clover averaged 7% of herbage for the season.
Intervention effect Applied phosphate increased late-summer clover growth from 41 to 292 kg DM ha −1 on P-deficient, propyzamide-sprayed plots.
Observation Propyzamide-associated changes decreased the proportion of H. lanatus.
Observation Propyzamide-associated changes decreased the proportion of F. rubra.
Observation Propyzamide-associated changes increased the proportion of A. capillaris.
Intervention effect Phosphate encouraged second-year spread of clover from slots.
Intervention effect Propyzamide encouraged second-year spread of clover from slots.

Observationobservedoriginal resultmeasured

Claim · model-written summary

Both MSMA-treated and untreated rice plants showed a decrease of ethylene and total arsenic prior to panicle emergence.

Taxon: RiceOryza sativat0
Organ / stage: panicle emergencee1
Outcome: prior to panicle emergencee1
Direction: decreasee1

Verbatim

t0
“Rice (Oryza sativa)”
✓ located verbatim in the source · title, characters 29–48

e1
“a decrease prior to panicle emergence”
✓ located verbatim in the source · abstract, characters 766–803

Title

MSMA-Induced Straighthead in Rice (Oryza sativa) and Effect upon Metabolism and Yield

Diana K. Horton; Robert E. Frans; Tom Cothren Weed Science 1983. doi:10.1017/s0043174500070120

Other claims from this paper (8)

Intervention effect MSMA applied at 6 kg/ha caused some straighthead in rice.
Intervention effect MSMA applied at 6 kg/ha reduced rice yield by 45%.
Intervention effect MSMA applied at 9 kg/ha produced evident straighthead in rice.
Intervention effect MSMA applied at 9 kg/ha reduced rice yield by 85%.
Intervention effect Ethylene and total arsenic concentrations in leaves of rice grown in MSMA-treated soil were higher at every growth stage than in plants grown in untreated soil.
Observation Both MSMA-treated and untreated rice plants showed marked increases of ethylene and total arsenic during the reproductive stage.
Association IAA levels changed significantly with the growth stage in both treated and untreated rice samples.
Intervention effect MSMA had no obvious effect on IAA levels at any of the stages examined.

Associationobservedoriginal resultmeasured

Claim · model-written summary

Rice grain yield decreased with increasing seedling age.

Taxon: riceOryza sativat0
Treatment: seedling agee0
Outcome: Grain yielde0
Direction: decreasee0

Verbatim

e0
“Grain yield was found to decrease with the increase in seedling age”
✓ located verbatim in the source · abstract, characters 186–253

t0
“growth and yield of rice”
✓ located verbatim in the source · title, characters 51–75

Title

Effect of age of seedlings and planting density on growth and yield of rice under late planting

GHOSH D.C Madras Agricultural Journal 1982. doi:10.29321/maj.10.a02733

Other claims from this paper (8)

Intervention effect 40 day old seedlings were superior to 50 and 60 day old seedlings of rice varieties Pankaj and Masuri.
Intervention effect Younger seedlings produced higher numbers of tillers and panicles per unit area and more grains per panicle than older seedlings.
Intervention effect Younger seedlings gave a greater percentage of filled grains and higher test weight than older seedlings.
Observation Pankaj proved to be the highest yielding rice variety.
Intervention effect A spacing of 20x10 cm was optimum for both varieties compared with 20x15 cm.
Intervention effect The 20x10 cm spacing also recorded the highest panicle population per unit area.
Intervention effect The yield loss from using older seedlings was partially compensated by closer spacing.
Intervention effect Yield from 50 day old seedlings at 20x10 cm spacing (44.1 q/ha) was as good as from 40 day old seedlings at 20x10 cm (45.6 q/ha) and 20x15 cm (45.7 q/ha).

Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

One of three wheat cultivars showed a yield decrease under high seed-borne Fusarium.

Taxon: wheat (Triticum aestivum)Triticum aestivume0
Treatment: high level (average 47%)e2
Interactor: FusariumFusariume2pathogen
Outcome: yielde4
Direction: yield decreasee4
Qualifier: One wheat cultivar out of threee4
Comparator: low level of seed-borne Fusarium (average 4%)e2

Verbatim

e0
“Seed lots from different cultivars of oats (Avena sativa), barley (Hordeum vulgare) and wheat (Triticum aestivum) were compared in yield tests at two sites in Quebec”
✓ located verbatim in the source · abstract, characters 0–165

e2
“For each cultivar, two seed lots were used, one with a low level of seed-borne Fusarium (average 4%) and the other with a high level (average 47%)”
✓ located verbatim in the source · abstract, characters 167–313

e4
“One wheat cultivar out of three sustained yield decrease”
✓ located verbatim in the source · abstract, characters 599–655

Title

RENDEMENT EN GRAINS DE PARCELLES DE CEREALES DE PRINTEMPS ORIGINANT DE SEMENCES CONTAMINEES PAR DES Fusarium spp

LUC COUTURE Canadian Journal of Plant Science 1983. doi:10.4141/cjps83-078

Other claims from this paper (5)

Intervention effect Yield increased or decreased with seed-borne Fusarium, depending on the cultivar.
Observation The yield trend with seed-borne Fusarium was similar at both sites but of different magnitude.
Intervention effect Barley was the most affected cereal: three of four cultivars showed a yield decrease under high seed-borne Fusarium.
Intervention effect None of the three oats suffered yield damage from seed-borne Fusarium.
Recommendation Seed germination should be considered when selecting seed lots for cereal cultivar comparisons.

Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

Boron application linearly decreased soybean yield.

Taxon: soybeans (Glycine max, [L.] Merr.)Glycine maxt0
Treatment: Boron applicatione0
Outcome: yielde0
Direction: decreasee0

Not reportedComparator

Verbatim

e0
“Boron application resulted in a linear increase in leaf tissue B and a linear decrease in yield.”
✓ located verbatim in the source · abstract, characters 396–492

t0
“soybeans (Glycine max, [L.] Merr.)”
✓ located verbatim in the source · abstract, characters 89–123

Title

BORON MOVEMENT IN A NORFOLK LOAMY SAND1

C. A. PINYERD; J. W. ODOM; F. L. LONG; et al. Soil Science 1984. doi:10.1097/00010694-198406000-00008

Other claims from this paper (8)

Intervention effect Boron application linearly increased soybean leaf tissue B.
Intervention effect Gypsum did not alleviate boron toxicity in soybeans.
Intervention effect Gypsum did not affect soil boron movement.
Association Cumulative rainfall was linearly related to loss of hot-water-soluble B from the Ap horizon.
Association Cumulative rainfall was linearly related to accumulation of B in BA and Btl horizons.
Intervention effect Treatments did not affect soil solution B in the Btl horizon.
Observation Hot-water-soluble B increased in the Btl horizon during sampling.
Observation Over 393 days, 85% of B lost from the Ap horizon was recovered in BA and Btl horizons.

Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

Senga Sengana yield had begun decreasing by July 28 planting.

Taxon: StrawberryFragaria ×ananassat0
Treatment: planted on the 28th of Julye0
Outcome: yielde0
Direction: decreasee0

Not reportedComparator

Verbatim

e0
“the yield had just started to decrease when planted on the 28th of July”
✓ located verbatim in the source · abstract, characters 339–410

t0
“Strawberry”
✓ located verbatim in the source · title, characters 49–59

Title

Effect of Planting Date and Defoliation on Three Strawberry Cultivars

Rolf Nestby Acta Agriculturae Scandinavica 1985. doi:10.1080/00015128509435776

Other claims from this paper (14)

Observation The three strawberry cultivars differed somewhat in response to heat sum.
Intervention effect Bounty yield seemed reduced after planting later than July 7.
Intervention effect Senga Sengana planting date response was not significant.
Recommendation Fructana needed planting before June 16 to avoid yield reduction.
Intervention effect Delayed planting generally reduced flower number in the first cropping year.
Intervention effect Latest planting increased berry size for Bounty and Senga Sengana.
Intervention effect Latest planting decreased Fructana berry size.
Association Reduced heat sum reduced flower truss number in the second cropping year.
Intervention effect Defoliation after harvest tended to increase Senga Sengana yield.
Intervention effect Defoliation reduced Bounty yield.
Intervention effect Defoliation reduced Fructana yield.
Intervention effect Defoliation significantly affected flower number, with direction unstated.
Intervention effect Defoliation had no significant effect on berry size, crown number, or truss number.
Intervention effect Defoliation ten days after harvest reduced the percentage of rotten berries.

Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

Vegetative growth tended to decrease at higher CO2 levels.

Taxon: sweet pepperCapsicum annuumt0
Treatment: higher CO2 levelse0
Outcome: Vegetative growthe0
Direction: decreasee0
Qualifier: tended toe0

Not reportedComparator

Verbatim

e0
“Vegetative growth tended to decrease at higher CO2 levels”
✓ located verbatim in the source · abstract, characters 527–584

t0
“sweet pepper (Capsicum annuum L.)”
✓ located verbatim in the source · title, characters 91–124

Title

Effects of continuous and intermittent carbon dioxide enrichment on fruit set and yield of sweet pepper (Capsicum annuum L.).

E.M. Nederhoff; J.A.M. van Uffelen Netherlands Journal of Agricultural Science 1988. doi:10.18174/njas.v36i3.16671

Other claims from this paper (5)

Intervention effect At 500 p.p.m. CO2, fruit number was 60% higher than at 200 p.p.m.
Intervention effect Average fruit weight was not significantly affected by the CO2 treatments.
Intervention effect Leaf dry matter content increased at higher CO2 concentrations.
Intervention effect SLA and LAR were smaller at higher CO2 concentrations.
Intervention effect Intermittent CO2 enrichment was less favorable for setting and yield than continuous enrichment at the same average concentration.

Associationobservedoriginal resultnegativemeasured

Claim · model-written summary

Digestibility declined as dry matter yield increased.

Taxon: ryegrass/clover pasturee1
Outcome: digestibilitye0
Direction: decreasee0
Qualifier: increasing dry matter (DM) yielde0

Not reportedOrgan / stage

Verbatim

e0
“increasing dry matter (DM) yield was accompanied by a decrease in digestibility”
✓ located verbatim in the source · abstract, characters 467–546

e1
“The growth of ryegrass/clover pasture”
✓ located verbatim in the source · abstract, characters 9–46

Title

Factors influencing the yield and feeding value of pasture grown for conservation

J. A. Browse; R. M. Haslemore; R. Thaine New Zealand Journal of Crop and Horticultural Science 1984. doi:10.1080/03015521.1984.10427782

Other claims from this paper (16)

Observation Dry matter yield increased during growth within treatments.
Association Crude protein content declined as dry matter yield increased.
Intervention effect Treatment 2 did not significantly lower DM production relative to Treatment 1.
Intervention effect Treatment 2 produced more stem material than Treatment 1.
Intervention effect Treatment 2 digestibility was 3–12 percentage units lower than Treatment 1.
Intervention effect Treatment 2 reduced digestible dry matter yield by 15–40% relative to Treatment 1 at equal digestibility.
Observation At 70% digestibility, Treatment 2 yielded 4.8 t DM/ha per year.
Observation At 70% digestibility, Treatment 1 yielded 6.3 t DM/ha per year.
Intervention effect Treatment 3 produced a more vegetative sward than Treatments 1 and 2.
Intervention effect Treatment 3 lowered DM production relative to Treatments 1 and 2.
Intervention effect Treatment 3 lowered DDM production relative to Treatments 1 and 2.
Intervention effect Treatment 3 and Treatment 1 had similar digestibility for most of 1980–81.
Observation Late flowering Cynosurus in Treatment 3 increased early stem material in 1981–82.
Observation Digestibility was reduced in the 1981–82 Treatment 3 sward.
Observation After about 40 days, floral development completion in Treatment 3 prevented further digestibility decline.
Recommendation Early closing and cutting are recommended for high-quality conserved crops.

Associationobservedoriginal resultnegativemeasured

Claim · model-written summary

Prolific genotypes showed a greater decrease in N utilization efficiency as fertilizer increased.

Taxon: maizeZea mayse1
Material: maizee1
Treatment: N fertilizatione0
Outcome: N utilization efficiencye0
Direction: decreasee0

Verbatim

e0
“showed a greater decrease in N utilization efficiency as N fertilization was increased”
✓ located verbatim in the source · abstract, characters 746–832

e1
“maize [ Zea mays L.]”
✓ located verbatim in the source · abstract, characters 54–74

Title

Prolificacy and N Fertilizer Effects on Yield and N Utilization in Maize¹

E. L. Anderson; E. J. Kamprath; R. H. Moll Crop Science 1985. doi:10.2135/cropsci1985.0011183x002500040005x

Other claims from this paper (9)

Observation Prolific genotypes had greater N utilization efficiency at all N fertility levels.
Observation Prolific genotypes partitioned a larger proportion of plant N to grain.
Mechanism Prolific genotypes apparently increased N remobilization.
Intervention effect Increased N fertility raised ear number per plant in semi-prolific genotypes.
Intervention effect Increased N fertility raised grain N content in semi-prolific genotypes.
Intervention effect Increased N fertility raised grain yield in semi-prolific genotypes.
Intervention effect Dry matter partitioned to grain increased with N fertility in semi-prolific genotypes.
Association Grain yield response to N fertility did not necessarily indicate greater N utilization efficiency.
Recommendation Selecting for prolificacy under low N fertility may identify genotypes with more efficient N utilization.

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“yield decrease”

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