Search claims · PlantClaims

Observationobservedoriginal resultnegativemeasured

Claim · model-written summary

Maize yield decreased from generation 17 onward.

Taxon: Zea maysZea mayst0
Outcome: decrease in yielde0
Direction: decreasee0
Qualifier: from generation 17 onwardse0

Verbatim

e0
“decrease in yield from generation 17 onwards”
✓ located verbatim in the source · abstract, characters 133–177

t0
“Zea mays 'Hays Golden'”
✓ located verbatim in the source · abstract, characters 68–90

Title

Quantitative genetic studies and population improvement in maize and sorghum

C Gardner 1976

Other claims from this paper (6)

Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

Carbamate treatments could decrease yield through toxicity when nematode populations were low.

Taxon: CottonGossypium hirsutumt0
Treatment: carbamate nematicidese1
Outcome: yielde0
Direction: decreasee0
Qualifier: the toxicity of the materials was manifested when nematode populations were lowe0

Not reportedComparator

Verbatim

e0
“or in a yield decrease, because the toxicity of the materials was manifested when nematode populations were low.”
✓ located verbatim in the source · abstract, characters 851–963

e1
“with organophosphate and carbamate nematicides”
✓ located verbatim in the source · abstract, characters 706–752

t0
“Cotton”
✓ located verbatim in the source · title, characters 61–67

Title

Granular Nematicides as Adjuncts to Fumigants for Control of Cotton Root-knot Nematodes.

E C Jorgenson PubMed 1979

Other claims from this paper (12)

Intervention effect Cotton growth and yield were best with fumigants combined with organophosphate nematicides.
Intervention effect Cotton growth and yield were best with fumigants combined with carbamate nematicides.
Intervention effect Organophosphates alone failed to give season-long root-knot nematode control.
Intervention effect Carbamates alone failed to give season-long root-knot nematode control.
Mechanism Long-term control was poor because temporary sublethal effects diminished soon enough for nematodes to reproduce.
Observation Nematodes survived treatments and a year of nonhost culture and damaged a susceptible crop two years after treatment.
Intervention effect Fumigant-treated plots showed no such subsequent crop damage.
Intervention effect Fumigant plus organophosphate plots showed no such subsequent crop damage.
Intervention effect Fumigant plus carbamate plots showed no such subsequent crop damage.
Intervention effect Organophosphate treatment of seed or cotton gave little or no yield increase because control was minimal and temporary.
Intervention effect Carbamate treatment of seed or cotton gave little or no yield increase because control was minimal and temporary.
Intervention effect Organophosphate treatments could decrease yield through toxicity when nematode populations were low.

Intervention effectobservedoriginal resultno effectnot significant (as stated)measured

Claim · model-written summary

Yield did not decrease significantly until more than 60 cm of plot area was removed.

Taxon: spring wheatTriticum aestivumt0
Treatment: more than 60 cm (12.5%) of plot area was removede0
Outcome: yield of the genotypese0
Direction: decreasee0
Value: 60 cm (12.5%)e0

Not reportedComparator

Verbatim

e0
“Generally, no significant decrease in yield of the genotypes was detected until more than 60 cm (12.5%) of plot area was removed.”
✓ located verbatim in the source · abstract, characters 415–544

t0
“spring wheat”
✓ located after whitespace/quote normalisation · title, characters 38–50

Title

Yield Adjustment for Missing Units in Spring Wheat¹

Robert H. Busch; Yusuf Ergun Crop Science 1973. doi:10.2135/cropsci1973.0011183x001300010044x

Other claims from this paper (3)

Association Mean yield reduction per missing unit was about 4.55%.
Association Yield reduction per missing unit ranged from 3.7 to 5.0% across genotypes and years.
Method / resource Yield adjustments using the mean reduction were satisfactory after more than two missing units.

Observationobservedoriginal resultmeasured

Claim · model-written summary

The yield decrease after the first barley crop on fallow land was generally accompanied by decreased foliage N and K concentration.

Taxon: barleyHordeum vulgaree0
Outcome: foliage N and K concentratione0
Direction: decreasee0

Verbatim

e0
“The decrease in yields after the first barley crop on fallow land was accompanied generally by a decrease in foliage N and K concentration”
✓ located verbatim in the source · abstract, characters 478–616

Title

EFFECTS OF GROWING BARLEY CONTINUOUSLY ON YIELDS, CHEMICAL CONSTITUENTS, AND DISEASE PREVALENCE

R. V. CLARK; A. R. MACK Canadian Journal of Plant Science 1974. doi:10.4141/cjps74-048

Other claims from this paper (9)

Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

Unprotected B. napus showed an apparent appreciable yield decrease.

Taxon: B. napusBrassica napuse0
Treatment: unprotectede1
Outcome: decreasee0
Direction: decreasee0
Comparator: protectede1

Verbatim

e0
“B. napus, however, suffered an apparent appreciable decrease”
✓ located verbatim in the source · abstract, characters 725–785

t0
“RESPONSE OF FOUR BRASSICA SEED CROP SPECIES TO ATTACK BY THE CRUCIFER FLEA BEETLE, PHYLLOTRETA CRUCIFERAE”
✓ located verbatim in the source · title, characters 0–105

e1
“Nevertheless the unprotected B. juncea treatment yielded as much as the protected; B. napus, however, suffered an apparent appreciable decrease and B. campestris a significant decrease.”
✓ located verbatim in the source · abstract, characters 642–827

Title

RESPONSE OF FOUR BRASSICA SEED CROP SPECIES TO ATTACK BY THE CRUCIFER FLEA BEETLE, PHYLLOTRETA CRUCIFERAE

L. G. PUTNAM Canadian Journal of Plant Science 1977. doi:10.4141/cjps77-143

Other claims from this paper (7)

Intervention effect Unprotected B. hirta seedlings sustained little flea beetle damage.
Intervention effect Unprotected B. hirta had seed yield as high as protected B. hirta.
Observation Unprotected B. juncea seedlings sustained severe damage.
Observation Unprotected B. napus seedlings sustained severe damage.
Observation Unprotected B. campestris seedlings sustained severe damage.
Intervention effect Unprotected B. juncea yielded as much as protected B. juncea.
Intervention effect Unprotected B. campestris had a significant yield decrease.

Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

4-terf-butyl catechol at suitable rates did not decrease yield.

Taxon: potatoSolanum tuberosume1
Treatment: 4‐terf‐butyl catechole0
Outcome: yielde0
Direction: did not decreasee0
Qualifier: 25 or 12‐5 μ g/ge0

Not reportedComparator

Verbatim

e0
“4‐terf‐butyl catechol was more effective than any other compound tested, including quintozene, and at suitable rates (25 or 12‐5 μ g/g) did not decrease yield”
✓ located verbatim in the source · abstract, characters 843–1001

e1
“potato plants”
✓ located verbatim in the source · abstract, characters 231–244

Title

Glasshouse tests of quinones, polyhydroxybenzenes and related compounds against potato common scab

A. H. Mcintosh Annals of Applied Biology 1976. doi:10.1111/j.1744-7348.1976.tb00602.x

Other claims from this paper (12)

Intervention effect Chemical treatments varied widely in scab control.
Intervention effect Chemical treatments varied widely in phytotoxic reduction of tuber yield.
Observation Corresponding 1,4-benzoquinones and hydroquinones had similar effects.
Intervention effect Unsubstituted and phenyl-, chloro-, 2,5- and 2,6-dichloro compounds controlled scab as effectively as quintozene.
Intervention effect Those compounds other than chloro-hydroquinone did not reduce tuber yield.
Intervention effect Chloranil was much less effective against scab.
Intervention effect Chloroneb was much less effective against scab.
Intervention effect Chloroneb decreased tuber yield.
Intervention effect 4-terf-butyl catechol controlled scab better than all tested compounds including quintozene.
Intervention effect Other hydroxybenzenes were almost ineffective against scab.
Intervention effect Some 1,4-naphthaquinones including dichlone were almost ineffective.
Intervention effect Anthraquinones were almost ineffective against scab.

Intervention effectobservedoriginal resultnegativesignificant (as stated)measured

Claim · model-written summary

A significant yield decrease due to fertilizer with the seed was observed in two trials.

Taxon: cornZea mays subsp. mayse0
Treatment: Fertilizer was banded with the seede0
Outcome: yielde1
Direction: decreasee1
Qualifier: in two trialse1

Not reportedComparator

Verbatim

e0
“Fertilizer was banded with the seed of corn”
✓ located verbatim in the source · abstract, characters 9–52

e1
“A significant yield decrease due to fertilizer with the seed was observed in two trials”
✓ located verbatim in the source · abstract, characters 433–520

Title

Response of Corn to Small Amounts of Fertilizer Placed with the Seed: II. Summary of 22 Field Trials¹

T. E. Bates Agronomy Journal 1971. doi:10.2134/agronj1971.00021962006300030006x

Other claims from this paper (9)

Intervention effect Fertilizer banded with the seed delayed corn emergence in several trials.
Intervention effect Fertilizer banded with the seed reduced corn emergence in several trials.
Intervention effect On average, fertilizer with the seed increased the dry weight of 36-day-old plants by 36%.
Intervention effect On average, fertilizer with the seed decreased the time to silking by 1.2 days.
Intervention effect On average, fertilizer with the seed decreased ear moisture at harvest by 1.2%.
Intervention effect On average, fertilizer with the seed increased grain yield by 2.9%.
Intervention effect Fertilizer with the seed reduced ear node height.
Intervention effect Fertilizer with the seed reduced plant height in two trials.
Intervention effect The effect of fertilizer with the seed on lodging was variable.

Associationobservedoriginal resultmixedmeasured

Claim · model-written summary

A 30% yield increase was associated with a 3% quality decrease.

Taxon: cornZea mays subsp. mayst0
Outcome: Yield increasese0
Direction: increasese0
Value: 30%e0
Comparator: qualitye0

Verbatim

e0
“Yield increases of 30% were associated with a 3% decrease in quality.”
✓ located verbatim in the source · abstract, characters 441–510

t0
“corn silage production”
✓ located verbatim in the source · abstract, characters 135–157

Title

EFFETS DE LA DENSITE DU PEUPLEMENT ET DE L’APPORT DES ELEMENTS N, P ET K SUR LA PRODUCTION D’ENSILAGE DE MAIS DE MATURITE DIFFERENTE

JEAN GENEST; JEAN-LOUIS DIONNE Canadian Journal of Plant Science 1977. doi:10.4141/cjps77-107

Other claims from this paper (6)

Observation Funk’s G 4252 corn produced 18,325 kg/ha dry matter on average under the stated spacing and nitrogen dose.
Association Nitrogen fertilization, density and hybrid choice were most important for dry matter production.
Observation Optimum yield was predicted at 133,000 pl/ha and 180 kg/ha N.
Intervention effect P and K fertilization produced no significant response.
Observation Annual P at 50 kg/ha increased available soil P.
Observation Soil exchangeable K declined despite annual K at 200 kg/ha.

Mechanismauthor interpretationoriginal resultmeasured

Claim · model-written summary

High population yield decline was suggested to result from fewer grains per area.

Taxon: wheatTriticum aestivumt0
Outcome: decrease in grain yielde0
Qualifier: decrease in the number of grains per unit areae0

Verbatim

e0
“the decrease in grain yield at high populations is probably determined by a decrease in the number of grains per unit area.”
✓ located verbatim in the source · abstract, characters 1818–1941

t0
“wheat”
✓ located verbatim in the source · title, characters 50–55

Title

Plant population, shading and thinning studies in wheat

R. W. Willey; R. Holliday The Journal of Agricultural Science 1971. doi:10.1017/s0021859600064522

Other claims from this paper (10)

Intervention effect Shading during ear development decreased wheat grain yield.
Intervention effect Ear development shading decreased grains per ear.
Intervention effect Grain filling shading reduced grain yield.
Intervention effect Grain filling shading decreased grain size.
Intervention effect Thinning at anthesis did not increase yield per remaining ear.
Observation Earlier thinning showed competition progressively reduced ear capacity.
Association Higher population competition accelerated reduction in ear potential.
Association Grains per ear were suggested to most influence yield decline above optimum population.
Association Grain yield per area closely related to grains per area across population response curves.
Mechanism Fewer grains per area at high density were attributed more to reduced late dry matter production than unfavorable partitioning.

Observationobservedoriginal resultmixedmeasured

Claim · model-written summary

Additional early hybrids showed yield responses ranging from a 37% increase to a 14% decrease after five-leaf defoliation.

Taxon: CornZea mays subsp. mayst0
Material: early hybridse1
Outcome: Yield responsese0
Value: a 37%, increase to a 14% decreasee0
Setting: Southern Minnesotae1

Verbatim

e0
“Yield responses ranged from a 37%, increase to a 14% decrease.”
✓ located verbatim in the source · abstract, characters 711–773

e1
“Eleven additional early hybrids at one Southern Minnesota location were defoliated at the 5‐leaf stage in 1975.”
✓ located verbatim in the source · abstract, characters 599–710

t0
“Corn”
✓ located verbatim in the source · title, characters 26–30

Title

Early Defoliation Affects Corn Grain Yields¹

R. Kent Crookston; D. R. Hicks Crop Science 1978. doi:10.2135/cropsci1978.0011183x001800030033x

Other claims from this paper (4)

Intervention effect Five-leaf defoliation reduced full-season hybrid yield by 80% over three years.
Intervention effect Five-leaf defoliation increased short-season hybrid yield by 48% over three years.
Observation The 1976 trials produced yield changes from a 32% reduction to a 53% increase.
Mechanism The authors propose that early growth alteration or inhibited leaf function could enhance yield.

“yield decrease”

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