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“yield decrease”

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Observationobservedoriginal resultno effectmeasured

Claim · model-written summary

There was no evidence that fungal diseases were involved in the herbage yield decrease at Rothamsted.

Taxon: Grass Swardst0
Outcome: no evidence that fungal diseases were involvede1

Verbatim

t0
“Grass Swards”
✓ located verbatim in the source · title, characters 61–73

e1
“There was no evidence that fungal diseases were involved”
✓ located verbatim in the source · abstract, characters 1126–1182

Title

Effect of Fungicides and Fertilizer on Yield and Diseases of Grass Swards

E. W. BROOM; A. J. HEARD; ELLIS GRIFFITHS; et al. Plant Pathology 1975. doi:10.1111/j.1365-3059.1975.tb01881.x

Other claims from this paper (15)

Intervention effect Fungicides did not affect total annual dry matter yields at any of the three sites.
Intervention effect Some fungicides slightly affected yield at some individual harvests.
Observation Slight crown rust occurred on perennial ryegrass at Hurley in autumn 1972.
Intervention effect Crown rust on perennial ryegrass was well controlled by oxycarboxin.
Intervention effect Crown rust on perennial ryegrass was slightly controlled by benomyl.
Intervention effect Yields of perennial ryegrass were not increased although crown rust was controlled by oxycarboxin and slightly by benomyl.
Observation Drechslera spp. seemed slightly more common where the rust was controlled.
Intervention effect At Hurley the ley yielded more with 400 kg N/ha than with 100 kg N/ha.
Intervention effect The extra nitrogen fertilizer did not damage the sward at Hurley.
Intervention effect The extra nitrogen fertilizer did not affect the amount of disease at Hurley.
Intervention effect At Aberystwyth the leys were not damaged by 400 kg N/ha.
Observation Yields at Aberystwyth were large.
Intervention effect On old pasture at Rothamsted, extra NK fertilizer never increased the yield of herbage.
Intervention effect On old pasture at Rothamsted, extra NK fertilizer once slightly decreased the yield of herbage.
Mechanism The authors suggest the yield decrease may have been because patches of sward failed to regrow where more fertilizer was applied.

Mechanismhypothesisoriginal resultbasis n/a

Claim · model-written summary

The authors suggest the yield decrease may have been because patches of sward failed to regrow where more fertilizer was applied.

Taxon: Grass Swardst0
Treatment: more fertilizere1
Outcome: patches of sward failed to regrowe1

Verbatim

t0
“Grass Swards”
✓ located verbatim in the source · title, characters 61–73

e1
“perhaps because patches of sward failed to regrow where the crop received more fertilizer”
✓ located verbatim in the source · abstract, characters 1035–1124

Title

Effect of Fungicides and Fertilizer on Yield and Diseases of Grass Swards

E. W. BROOM; A. J. HEARD; ELLIS GRIFFITHS; et al. Plant Pathology 1975. doi:10.1111/j.1365-3059.1975.tb01881.x

Other claims from this paper (15)

Intervention effect Fungicides did not affect total annual dry matter yields at any of the three sites.
Intervention effect Some fungicides slightly affected yield at some individual harvests.
Observation Slight crown rust occurred on perennial ryegrass at Hurley in autumn 1972.
Intervention effect Crown rust on perennial ryegrass was well controlled by oxycarboxin.
Intervention effect Crown rust on perennial ryegrass was slightly controlled by benomyl.
Intervention effect Yields of perennial ryegrass were not increased although crown rust was controlled by oxycarboxin and slightly by benomyl.
Observation Drechslera spp. seemed slightly more common where the rust was controlled.
Intervention effect At Hurley the ley yielded more with 400 kg N/ha than with 100 kg N/ha.
Intervention effect The extra nitrogen fertilizer did not damage the sward at Hurley.
Intervention effect The extra nitrogen fertilizer did not affect the amount of disease at Hurley.
Intervention effect At Aberystwyth the leys were not damaged by 400 kg N/ha.
Observation Yields at Aberystwyth were large.
Intervention effect On old pasture at Rothamsted, extra NK fertilizer never increased the yield of herbage.
Intervention effect On old pasture at Rothamsted, extra NK fertilizer once slightly decreased the yield of herbage.
Observation There was no evidence that fungal diseases were involved in the herbage yield decrease at Rothamsted.

Mechanismauthor interpretationoriginal resultnegativemeasured

Claim · model-written summary

Yield potential of soybean is restricted by a decrease in number of pods or seed.

Taxon: SoybeanGlycine maxe0
Outcome: yield potentiale4
Qualifier: a decrease in number of pods or seede4

Verbatim

e0
“Soybean plants growing at day/night temperatures of 30/18, 26/18, and 22/18 C were subjected to a single drying and recovery cycle during an 18- to 19-day period in the early to midpod development stage”
✓ located verbatim in the source · abstract, characters 0–202

e4
“However, a similar average weight per pod for both stressed and control plants at the conclusion of the recovery period suggests that individual pod development is not irreversibly affected by a single stress cycle and that yield potential is restricted by a decrease in number of pods or seed”
✓ located verbatim in the source · abstract, characters 765–1058

Title

Growth and Specific Nodule Activity of Soybean during Application and Recovery of a Leaf Moisture Stress

Robert P. Patterson; C. David Raper; H. Douglass Gross PLANT PHYSIOLOGY 1979. doi:10.1104/pp.64.4.551

Other claims from this paper (10)

Intervention effect Leaf total electrochemical water potential of soybean fell to about -24 bars during a 4-day drying cycle, compared with control levels.
Intervention effect Leaf total electrochemical water potential of soybean recovered to control levels after rewatering.
Intervention effect Vegetative and reproductive growth of soybean were about equally suppressed by leaf moisture stress.
Intervention effect Leaf moisture stress reduced the rate of appearance and number of pods of soybean.
Intervention effect Dry matter accumulation in soybean plants and pods was unaffected by temperature.
Intervention effect After a single stress cycle, soybean pods had a similar average weight in stressed and control plants.
Association Specific nodule activity and energy charge of soybean nodules declined with leaf moisture potential.
Intervention effect Recovery of specific nodule activity lagged behind recovery of leaf moisture potential after rewatering in soybean.
Intervention effect Energy charge of soybean nodules recovered as rapidly as leaf moisture potential upon rewatering.
Association The delayed recovery of specific nodule activity in soybean appears unrelated to recovery of nodule energy charge.

Recommendationauthor interpretationoriginal resultpositivebasis n/a

Claim · model-written summary

The authors suggest different approaches may be needed to minimize losses from the two pathogens.

Taxon: broad beansVicia fabat0
Outcome: different approaches to minimise yield lossese0

Verbatim

e0
“the two leaf spotting pathogens decrease yield in different ways and so may require different approaches to minimise yield losses”
✓ located verbatim in the source · abstract, characters 626–755

t0
“broad beans”
✓ located verbatim in the source · title, characters 10–21

Title

Growth of broad beans infected by Uromyces viciae‐fabae

P. F. WILLIAMS Annals of Applied Biology 1978. doi:10.1111/j.1744-7348.1978.tb02640.x

Other claims from this paper (6)

Observation Rust reduced leaf area ratio during pod filling.
Observation Rust did not increase net assimilation rate.
Mechanism Rust diminished assimilate supply to developing beans.
Observation Rust decreased bean weight per pod.
Observation Rust decreased bean yield per plant.
Mechanism Botrytis fabae reduces yield by decreasing pods per plant.

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