Search claims · PlantClaims

Observationobservedoriginal resultnegativemeasured

Claim · model-written summary

The largest barley monoculture yield decrease occurred in years three to five.

Taxon: barleyHordeum vulgaree0
Outcome: yield decreasee0
Direction: decreasee0
Qualifier: 3rd to 5th yeare0

Verbatim

e0
“Experiments have further shown that the biggest yield decrease occurs in the 3rd to 5th year of barley monoculture.”
✓ located verbatim in the source · abstract, characters 1463–1578

Title

Danish Experiences with Cereals in Monoculture¹

A. Jensen EPPO Bulletin 1975. doi:10.1111/j.1365-2338.1975.tb02477.x

Other claims from this paper (19)

Intervention effect Cereal monoculture led to yield depletion.
Mechanism take‐all was a main factor in cereal yield loss.
Mechanism eyespot was a main factor in cereal yield loss.
Observation New barley varieties were highly resistant to the cereal cyst nematode.
Mechanism The named parasites did not explain all yield losses.
Observation Barley monoculture yield declining the first 2–4 years.
Observation Barley monoculture yield remains stable after that.
Observation Barley monoculture take‐all declines after that.
Intervention effect Adding straw to the soil had little effect on barley yield or disease.
Intervention effect burning it had little effect on barley yield or disease.
Intervention effect Postharvest soil treatments had little effect.
Observation Barley monoculture yield decrease was usually minor on fertile soils in Denmark.
Intervention effect Postharvest soil treatment had little effect on disease and yield except on heavily weed infested land.
Observation The cereal root nematode remained a threat to oat and spring wheat.
Intervention effect Monocultures of different host plants reduced nematode populations.
Intervention effect Benomyl successfully controlled eyespot in winter wheat.
Intervention effect Benomyl successfully controlled eyespot in winter rye.
Observation Field chemical control of take-all appeared infeasible despite good laboratory tests.
Observation Breeding for take-all resistance was judged difficult and of doubtful economic value.

Observationobservedoriginal resultno effectnot significant (as stated)measured

Claim · model-written summary

Thinning treatments did not significantly decrease yield per tree.

Taxon: ‘Wilking’ mandarinst0
Outcome: yield in kg per treee0
Direction: without significant decreasee0

Verbatim

e0
“without significant decrease of yield in kg per tree.”
✓ located verbatim in the source · abstract, characters 243–296

t0
“‘Wilking’ Mandarins”
✓ located verbatim in the source · title, characters 55–74

Title

Improving Fruit Size and Breaking Alternate Bearing in ‘Wilking’ Mandarins by Ethephon and Other Agents1

S. Galliani; S. P. Monselise; R. Goren HortScience 1975. doi:10.21273/hortsci.10.1.68

Other claims from this paper (9)

Intervention effect Ethephon caused satisfactory thinning in heavily loaded mandarin trees.
Intervention effect NAA caused satisfactory thinning in heavily loaded mandarin trees.
Intervention effect Ethephon increased individual fruit size by 64% versus hand thinning.
Intervention effect NAA increased individual fruit size by 48% versus hand thinning.
Intervention effect Ethephon increased profit by about 30% versus hand thinning.
Intervention effect NAA increased profit by about 30% versus hand thinning.
Intervention effect Summer pruning had similar effects but a smaller fruit size increase.
Intervention effect Ethephon reduced alternate bearing.
Observation After ethephon, 57% of treated trees had satisfactory yields the following year.

Observationobservedoriginal resultnegativemeasured

Claim · model-written summary

The seed yield decrease in pinto beans was comparable to reductions in leaf and stem biomass.

Taxon: pinto beanst0
Outcome: decrease in seed yielde0
Direction: decreasee0
Comparator: reductions in biomass of leaves and stemse0

Verbatim

e0
“the decrease in seed yield was comparable to reductions in biomass of leaves and stems”
✓ located verbatim in the source · abstract, characters 579–665

t0
“pinto beans”
✓ located verbatim in the source · title, characters 67–78

Title

Effects of simulated acid rain on growth and yield of soybeans and pinto beans

Levi Evans; Keith F. Lewin OSTI OAI (U.S. Department of Energy Office of Scientific and Technical Information) 1979

Other claims from this paper (7)

Intervention effect Rain at pH 3.1 and below decreased seed, leaf and stem dry mass in pinto beans.
Mechanism The reduced yield of pinto beans was attributed to fewer pods per plant.
Mechanism The reduced yield of pinto beans was attributed to fewer seeds per pod.
Intervention effect Simulated acid rain decreased soybean stem and leaf dry mass.
Intervention effect Rain at pH 2.5 decreased soybean seed yield.
Intervention effect Rain at pH 3.1 increased soybean seed yield.
Mechanism Greater dry mass per seed accounted for the greater soybean seed mass per plant.

Observationobservedoriginal resultnegativemeasured

Claim · model-written summary

Barley monoculture yield decrease was usually minor on fertile soils in Denmark.

Taxon: barleyHordeum vulgaree0
Outcome: decreasee0
Direction: decreasee0
Qualifier: fertile soilse0
Setting: Denmarke0

Verbatim

e0
“In barley, which is dominating in Denmark, the decrease on fertile soils is usually of minor importance.”
✓ located verbatim in the source · abstract, characters 1358–1462

Title

Danish Experiences with Cereals in Monoculture¹

A. Jensen EPPO Bulletin 1975. doi:10.1111/j.1365-2338.1975.tb02477.x

Other claims from this paper (19)

Intervention effect Cereal monoculture led to yield depletion.
Mechanism take‐all was a main factor in cereal yield loss.
Mechanism eyespot was a main factor in cereal yield loss.
Observation New barley varieties were highly resistant to the cereal cyst nematode.
Mechanism The named parasites did not explain all yield losses.
Observation Barley monoculture yield declining the first 2–4 years.
Observation Barley monoculture yield remains stable after that.
Observation Barley monoculture take‐all declines after that.
Intervention effect Adding straw to the soil had little effect on barley yield or disease.
Intervention effect burning it had little effect on barley yield or disease.
Intervention effect Postharvest soil treatments had little effect.
Observation The largest barley monoculture yield decrease occurred in years three to five.
Intervention effect Postharvest soil treatment had little effect on disease and yield except on heavily weed infested land.
Observation The cereal root nematode remained a threat to oat and spring wheat.
Intervention effect Monocultures of different host plants reduced nematode populations.
Intervention effect Benomyl successfully controlled eyespot in winter wheat.
Intervention effect Benomyl successfully controlled eyespot in winter rye.
Observation Field chemical control of take-all appeared infeasible despite good laboratory tests.
Observation Breeding for take-all resistance was judged difficult and of doubtful economic value.

Observationobservedoriginal resultmeasured

Claim · model-written summary

Seed yield per plant did not apparently decrease in the high seed-weight line.

Taxon: PhalarisPhalarist0
Outcome: seed yield per plante0
Direction: no apparent decreasee0
Comparator: control populatione0

Verbatim

e0
“there was no apparent decrease in seed yield per plant in this line, compared with the control population”
✓ located verbatim in the source · abstract, characters 1346–1451

t0
“Phalaris”
✓ located verbatim in the source · title, characters 62–70

Title

Responses to selection for seed weight and seedling vigour in Phalaris

RJ Clements; BDH Latter Australian Journal of Agricultural Research 1974. doi:10.1071/ar9740033

Other claims from this paper (19)

Observation Selection responses were significant for seed weight, seedling weight, leaf size, and leaf appearance rate.
Observation Responses were linear in both selection directions.
Observation Realized heritability of seed weight was 0.35.
Observation Realized heritability of seedling weight was 0.12.
Observation Realized heritability of leaf size was 0.61.
Observation Realized heritability of leaf appearance rate was 0.38.
Association Leaf size correlated positively with seedling weight.
Association Leaf size correlated negatively with leaf appearance rate.
Observation Selecting for high seed weight increased seedling weight and leaf size.
Observation Selection for heavy seedlings or large leaves did not significantly increase seed weight.
Observation Selecting for light seedlings or small leaves reduced seed weight.
Observation Hybrid seedlings were nearly as heavy as those in the high seedling-weight line.
Observation Hybrid seedlings were significantly heavier than the mean of parent lines.
Observation Evidence suggested directional dominance, especially for leaf size.
Observation High seed-weight plants matured earlier and had fewer heads.
Observation High seed-weight plants had heavier seeds and more seeds per head.
Observation Spikelet and leaf-sheath areas were greater in the high seed-weight line.
Observation Flag and penultimate leaf areas were unchanged in the high seed-weight line.
Recommendation The authors conclude that selecting large leaves is relatively efficient for increasing seedling weight but reduces leaf appearance rate.

Observationobservedoriginal resultno effectmeasured

Claim · model-written summary

No yield decrease was found in alluvial paddy soil even under continuous direct sowing culture.

Taxon: riceOryza sativat0
Treatment: continuous direct sowing culturee1
Outcome: such decreasee1
Qualifier: could not be founde1
Setting: alluvial paddy soile0

Verbatim

t0
“Rice Yield Decrease Resulting from Continual Direct Sowing Culture”
✓ located verbatim in the source · title, characters 25–91

e1
“such decrease could not be found, even under continuous direct sowing culture”
✓ located verbatim in the source · abstract, characters 2521–2598

e0
“in alluvial paddy soil which was high in available phosphorus”
✓ located verbatim in the source · abstract, characters 2397–2458

Title

Studies on the Causes of Rice Yield Decrease Resulting from Continual Direct Sowing Culture : II. In relation to phosphorus nutrition

Yoshimasa UEMURA; AKIRA MIYASAKA Japanese Journal of Crop Science 1973. doi:10.1626/jcs.42.116

Other claims from this paper (9)

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)

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)

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.

Observationobservedreview summarynegativebasis n/a

Claim · model-written summary

The other mixture component usually has lower yield than its monoculture.

Taxon: PlantsViridiplantaee0
Outcome: decreasee0
Direction: decreasee0
Qualifier: usuallye0
Comparator: their own monoculturee0

Verbatim

e0
“Plants of the other component usually show a decrease, relative to their own monoculture”
✓ located verbatim in the source · abstract, characters 149–237

Title

A Revised Analysis of Plant Competition Experiments

C. A. McGilchrist; B. R. Trenbath Biometrics 1971. doi:10.2307/2528603

Other claims from this paper (3)

“yield decrease”

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