“yield decrease”

Claim · model-written summary

Yield decline in perennial ryegrass cultivars during hot dry summers correlated with bacterial wilt susceptibility.

Taxon

perennial ryegrassLolium perennee0

Material

cultivarse0

Interactor

Xanthomonas graminisXanthomonas graminist0pathogen

Outcome

yield decreasee0

Direction

decreasee0

Verbatim

e0

“A good correlation was established between the yield decrease of perennial ryegrass cultivars during hot, dry summers, and their susceptibility to bacterial wilt as determined in inoculation tests in the greenhouse and by field observations.”

t0

“Xanthomonas graminis”

Claim · model-written summary

Petroleum polluted soil reduced grass yield less than diesel oil.

Taxon

Lolium perenne L. × hybridum, Poa pratensis, Festuca rubra, F. arundinacea, Phleum pratense and Dactylis glomerataDactylis glomerataLolium perennePoa pratensisLolium arundinaceumPhleum pratenseFestuca rubrat0

Treatment

petroleume0

Outcome

yield of all grassese0

Direction

decrease being lowere0

Comparator

diesel oile0

Verbatim

t0

“Lolium perenne L. × hybridum, Poa pratensis, Festuca rubra, F. arundinacea, Phleum pratense and Dactylis glomerata”

e0

“Soil pollution with the tested products was found to significantly decrease the yield of all grasses, with the decrease being lower upon soil pollution with petroleum than with diesel oil.”

Claim · model-written summary

Diesel polluted soil significantly reduced yield of all tested grasses versus unpolluted soil.

Taxon

Lolium perenne L. × hybridum, Poa pratensis, Festuca rubra, F. arundinacea, Phleum pratense and Dactylis glomerataDactylis glomerataLolium perennePoa pratensisLolium arundinaceumPhleum pratenseFestuca rubrat0

Treatment

diesel oile0

Outcome

yield of all grassese0

Direction

decreasee0

Comparator

non-polluted soile0

Verbatim

t0

“Lolium perenne L. × hybridum, Poa pratensis, Festuca rubra, F. arundinacea, Phleum pratense and Dactylis glomerata”

e0

“The achieved results were compared with those determined for grasses grown on the non-polluted soil. Soil pollution with the tested products was found to significantly decrease the yield of all grasses, with the decrease being lower upon soil pollution with petroleum than with diesel oil.”

Claim · model-written summary

The reduction in seed yield from natural lodging was due to fewer seeds per unit area.

Taxon

perennial ryegrassLolium perennee0

Outcome

seed yielde1

Qualifier

a decrease in the number of seeds per unit areae1

Verbatim

e0

“The effects of lodging on the seed yield of S. 23 and S. 24 perennial ryegrass were investigated in a series of field experiments from 1973 to 1976”

e1

“Natural lodging severely reduced seed yield in all years as a result of a decrease in the number of seeds per unit area”

Claim · model-written summary

Perennial ryegrass cv. Tivoli yield decreased significantly between the first and second seed harvest years.

Taxon

perennial ryegrassLolium perennet0

Material

cv.Tivolie0

Outcome

yielde0

Direction

decreasee0

Comparator

first to the second year of seed harveste0

Verbatim

e0

“The tetraploid type cv.Tivoli had the highest thousand seed weight and a significant yield decrease from the first to the second year of seed harvest and a continuous decline in seed yield is observed from the first to the fifth harvest year in this cultivar.”

t0

“perennial ryegrass”

Claim · model-written summary

Aneuploidy had a severe negative effect on forage yield of Lolium perenne.

Taxon

Lolium perenneLolium perennet0

Treatment

Aneuploidye2

Outcome

forage yielde2

Direction

decreaseinferrede2

Not reportedComparator

Verbatim

t0

“Genetic variation in diploid and autotetraploid populations of Lolium perenne L.”

e2

“Aneuploidy had a severe effect upon forage yield, but did not change the earliness”

Claim · model-written summary

Natural lodging severely reduced seed yield of perennial ryegrass in all years.

Taxon

perennial ryegrassLolium perennee0

Treatment

Natural lodginge1

Outcome

seed yielde1

Direction

reducede1

Qualifier

severelye1

Setting

field experimentse0

Verbatim

e0

“The effects of lodging on the seed yield of S. 23 and S. 24 perennial ryegrass were investigated in a series of field experiments from 1973 to 1976”

e1

“Natural lodging severely reduced seed yield in all years as a result of a decrease in the number of seeds per unit area”

Claim · model-written summary

Sward yield was slightly reduced as soil pH increased from 3·8 to 4·3.

Taxon

Lolium perenneLolium perennet0

Treatment

increase in soil pH from 3·8 to 4·3e0

Outcome

sward yielde0

Direction

reductione0

Verbatim

e0

“A small reduction in sward yield and a large and highly significant decrease in total N recovered by the harvested material, which occurred with increase in soil pH from 3·8 to 4·3”

t0

“Lolium perenne and Trifolium repens”

Claim · model-written summary

Perennial ryegrass cv. Tivoli seed yield declined continuously from its first to fifth harvest year.

Taxon

perennial ryegrassLolium perennet0

Material

cv.Tivolie0

Outcome

seed yielde0

Direction

continuous declinee0

Comparator

first to the fifth harvest yeare0

Verbatim

e0

“The tetraploid type cv.Tivoli had the highest thousand seed weight and a significant yield decrease from the first to the second year of seed harvest and a continuous decline in seed yield is observed from the first to the fifth harvest year in this cultivar.”

t0

“perennial ryegrass”