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“yield decrease”

5 matches

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plus 1 non-evaluative

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1950 ’60 ’70 ’80 ’90 2000 ’10 ’20

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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)

Associationobservedoriginal resultsignificant (as stated)measured

Claim · model-written summary

Mean yield and utilization of true mountain mahogany were significantly negatively correlated (r=-0.90).

Taxon: true mountain mahoganye0
Outcome: mean yielde0
Direction: decreaseinferrede0
Value: r=-0.90e0
Comparator: mean utilizatione0

Verbatim

e0
“Mean yield and mean utilization were significantly (P<0.05) correlated (r=-0.90) for true mountain mahogany”
✓ located verbatim in the source · abstract, characters 675–782

Title

Mule Deer Numbers and Shrub Yield: Utilization on Winter Range

Allen E. Anderson; E. Medin; David C. Bowden Journal of Wildlife Management 1972. doi:10.2307/3799090

Other claims from this paper (5)

Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

Under continuous heavy grazing, the more productive grasses decreased on the prairie.

Taxon: Stipa-Bouteloua prairiee0
Treatment: continuous heavy grazinge1
Outcome: more productive grassese1
Direction: decreasee1

Not reportedComparator

Verbatim

e0
“Stipa-Bouteloua prairie was grazed by sheep at three stocking rates over a 19-year period”
✓ located verbatim in the source · abstract, characters 0–89

e1
“Under continuous heavy grazing the vegetative cover and forage yield deteriorated mainly through the large increase in blue grama and the decrease in the more productive grasses”
✓ located verbatim in the source · abstract, characters 91–268

Title

Range Vegetation and Sheep Production at Three Stocking Rates on Stipa-Bouteloua Prairie

S. Smoliak Journal of Range Management 1974. doi:10.2307/3896432

Other claims from this paper (6)

Intervention effect Under continuous heavy grazing, vegetative cover and forage yield deteriorated on the Stipa-Bouteloua prairie.
Intervention effect Under continuous heavy grazing, blue grama increased greatly on the prairie.
Intervention effect Mature ewes grazed at the heavy rate were lighter in body weight than those grazed at moderate or light intensities.
Intervention effect Mature ewes grazed at the heavy rate gave birth to smaller lambs than those grazed at moderate or light intensities.
Intervention effect Lambs from ewes grazed at the heavy rate were weaned at lower body weights than those grazed at moderate or light intensities.
Recommendation Stocking should not be below 1.0 acre per ewe per month to maintain vegetative cover in a productive condition.

Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

Under continuous heavy grazing, vegetative cover and forage yield deteriorated on the Stipa-Bouteloua prairie.

Taxon: Stipa-Bouteloua prairiee0
Treatment: continuous heavy grazinge1
Outcome: vegetative cover and forage yielde1
Direction: deterioratede1

Not reportedComparator

Verbatim

e0
“Stipa-Bouteloua prairie was grazed by sheep at three stocking rates over a 19-year period”
✓ located verbatim in the source · abstract, characters 0–89

e1
“Under continuous heavy grazing the vegetative cover and forage yield deteriorated mainly through the large increase in blue grama and the decrease in the more productive grasses”
✓ located verbatim in the source · abstract, characters 91–268

Title

Range Vegetation and Sheep Production at Three Stocking Rates on Stipa-Bouteloua Prairie

S. Smoliak Journal of Range Management 1974. doi:10.2307/3896432

Other claims from this paper (6)

Intervention effect Under continuous heavy grazing, blue grama increased greatly on the prairie.
Intervention effect Under continuous heavy grazing, the more productive grasses decreased on the prairie.
Intervention effect Mature ewes grazed at the heavy rate were lighter in body weight than those grazed at moderate or light intensities.
Intervention effect Mature ewes grazed at the heavy rate gave birth to smaller lambs than those grazed at moderate or light intensities.
Intervention effect Lambs from ewes grazed at the heavy rate were weaned at lower body weights than those grazed at moderate or light intensities.
Recommendation Stocking should not be below 1.0 acre per ewe per month to maintain vegetative cover in a productive condition.

Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

Under continuous heavy grazing, blue grama increased greatly on the prairie.

Taxon: Stipa-Bouteloua prairiee0
Treatment: continuous heavy grazinge1
Outcome: blue gramae1
Direction: increasee1

Not reportedComparator

Verbatim

e0
“Stipa-Bouteloua prairie was grazed by sheep at three stocking rates over a 19-year period”
✓ located verbatim in the source · abstract, characters 0–89

e1
“Under continuous heavy grazing the vegetative cover and forage yield deteriorated mainly through the large increase in blue grama and the decrease in the more productive grasses”
✓ located verbatim in the source · abstract, characters 91–268

Title

Range Vegetation and Sheep Production at Three Stocking Rates on Stipa-Bouteloua Prairie

S. Smoliak Journal of Range Management 1974. doi:10.2307/3896432

Other claims from this paper (6)

Intervention effect Under continuous heavy grazing, vegetative cover and forage yield deteriorated on the Stipa-Bouteloua prairie.
Intervention effect Under continuous heavy grazing, the more productive grasses decreased on the prairie.
Intervention effect Mature ewes grazed at the heavy rate were lighter in body weight than those grazed at moderate or light intensities.
Intervention effect Mature ewes grazed at the heavy rate gave birth to smaller lambs than those grazed at moderate or light intensities.
Intervention effect Lambs from ewes grazed at the heavy rate were weaned at lower body weights than those grazed at moderate or light intensities.
Recommendation Stocking should not be below 1.0 acre per ewe per month to maintain vegetative cover in a productive condition.

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“yield decrease”

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