Abstract
This study involves an assessment of the potential effects of greenhouse gas climate change, as well as the direct fertilization effect of CO 2 on crop yields in Cameroon. The methodology involves coupling the transient diagnostics of 2 atmosphere-ocean general circulation models, namely NASA/Goddard Institute GISS and the Hadley Centre's HadCM3, to the CropSyst crop model to simulate current and future (2020, 2080) crop yields (bambara nut, groundnut, maize, sorghum and soybean) in 8 agricultural regions of Cameroon. For the future we estimate substantial yield increases for bambara groundnut, soybean and groundnut, and little or no change and even decreases of maize and sorghum yields, varying according to the climate scenario and the agricultural region. Maize and sorghum (both C4 crops) yields are expected to decrease by 14.6 and 39.9%, respectively, across the whole country under GISS 2080 scenarios. The results also show that the effect of temperature patterns on climate change is much more important than that of precipitation. Findings call for monitoring of climate change/variability and dissemination of information to farmers, to encourage adaptation to climate change.
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Claims 9
Claim · model-written summary
Future bambara groundnut yields are projected to increase substantially, depending on scenario and region.
- Taxon
- bambara groundnut
Vigna subterraneae0 - Treatment
- climate scenarioe0
- Outcome
- yielde0
- Direction
- increasese0
- Qualifier
- varying according to the climate scenario and the agricultural regione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“For the future we estimate substantial yield increases for bambara groundnut, soybean and groundnut, and little or no change and even decreases of maize and sorghum yields, varying according to the climate scenario and the agricultural region.”
Claim · model-written summary
Future soybean yields are projected to increase substantially, depending on scenario and region.
- Taxon
- soybean
Glycine maxe0 - Treatment
- climate scenarioe0
- Outcome
- yielde0
- Direction
- increasese0
- Qualifier
- varying according to the climate scenario and the agricultural regione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“For the future we estimate substantial yield increases for bambara groundnut, soybean and groundnut, and little or no change and even decreases of maize and sorghum yields, varying according to the climate scenario and the agricultural region.”
Claim · model-written summary
Future groundnut yields are projected to increase substantially, depending on scenario and region.
- Taxon
- groundnut
Arachis hypogaeae0 - Treatment
- climate scenarioe0
- Outcome
- yielde0
- Direction
- increasese0
- Qualifier
- varying according to the climate scenario and the agricultural regione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“For the future we estimate substantial yield increases for bambara groundnut, soybean and groundnut, and little or no change and even decreases of maize and sorghum yields, varying according to the climate scenario and the agricultural region.”
Claim · model-written summary
Future maize yields show little or no change or decreases depending on scenario and region.
- Treatment
- climate scenarioe0
- Outcome
- yieldse0
- Direction
- little or no change and even decreasese0
- Qualifier
- varying according to the climate scenario and the agricultural regione0
Zea maysNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“little or no change and even decreases of maize and sorghum yields, varying according to the climate scenario and the agricultural region”
Claim · model-written summary
Future sorghum yields show little or no change or decreases depending on scenario and region.
- Treatment
- climate scenarioe0
- Outcome
- yieldse0
- Direction
- little or no change and even decreasese0
- Qualifier
- varying according to the climate scenario and the agricultural regione0
SorghumNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“little or no change and even decreases of maize and sorghum yields, varying according to the climate scenario and the agricultural region”
Claim · model-written summary
Maize yield is projected to decrease by 14.6% nationwide under GISS 2080 scenarios.
- Treatment
- GISS 2080 scenariose0
- Outcome
- yieldse0
- Direction
- decreasee0
- Value
- 14.6e0
- Qualifier
- across the whole countrye0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Maize and sorghum (both C4 crops) yields are expected to decrease by 14.6 and 39.9%, respectively, across the whole country under GISS 2080 scenarios.”
Claim · model-written summary
Sorghum yield is projected to decrease by 39.9% nationwide under GISS 2080 scenarios.
- Treatment
- GISS 2080 scenariose0
- Outcome
- yieldse0
- Direction
- decreasee0
- Value
- 39.9%e0
- Qualifier
- across the whole countrye0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Maize and sorghum (both C4 crops) yields are expected to decrease by 14.6 and 39.9%, respectively, across the whole country under GISS 2080 scenarios.”
Claim · model-written summary
Temperature patterns have a much more important effect than precipitation in the climate-change results.
- Outcome
- effect of temperature patterns on climate changee0
- Direction
- much more importante0
- Comparator
- precipitatione0
Not reportedTaxon
Verbatim
e0“The results also show that the effect of temperature patterns on climate change is much more important than that of precipitation.”
Claim · model-written summary
The authors recommend climate monitoring and information dissemination to farmers to encourage adaptation.
- Outcome
- monitoring of climate change/variability and dissemination of information to farmerse0
- Qualifier
- to encourage adaptation to climate changee0
Not reportedTaxon
Verbatim
e0“Findings call for monitoring of climate change/variability and dissemination of information to farmers, to encourage adaptation to climate change.”
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See all 18 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.