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“yield decrease”

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2010 ’20

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Taxon: cassava ✕

Taxon groups are the verbatim names found in the abstracts (case-insensitive), not normalised: maize, corn and Zea mays are separate groups here. The Organism view merges them through NCBI Taxonomy.

Intervention effectobservedoriginal resultpositivesignificant (as stated)measured

Claim · model-written summary

Weed biomass decreased significantly as weeding frequency increased.

Taxon: cassavaManihot esculentae1
Treatment: increasing the weeding timee0
Interactor: weede0weed
Outcome: Weed biomasse0
Direction: decreasee0

Not reportedComparator

Verbatim

e0
“Weed biomass was significant decrease by increasing the weeding time (p≤0.05).”
✓ located verbatim in the source · abstract, characters 963–1041

e1
“cassava root yield under difference weeding frequency”
✓ located verbatim in the source · abstract, characters 197–250

Title

Effect of Weed Biomass on Cassava Yield Related to Weeding Times

Phanthasin Khanthavong Advances in Plants & Agriculture Research 2016. doi:10.15406/apar.2016.05.00194

Other claims from this paper (9)

Observation Without weeding, the cassava plots had abundant weed cover.
Intervention effect One weeding gave uncertain weed growth reduction.
Intervention effect Two or more weedings restricted weed growth.
Intervention effect Cassava root yield increased significantly with weeding frequency.
Intervention effect Cassava root yield was high after two or three weedings.
Observation One weeding produced widely varying cassava root yield.
Intervention effect No weeding gave 15% of the cassava root yield with three weedings.
Association Weed biomass explained much of cassava root yield variation (R2=0.811).
Recommendation Extension advice should base weeding on weed biomass rather than time to save labor.

Intervention effectobservedoriginal resultnegativesignificant (as stated)measured

Claim · model-written summary

Using 25.0 t/ha burnt rice husk with potassium fertilizer significantly reduced fresh tuber yield.

Taxon: cassavaManihot esculentat0
Treatment: 25.0 t/ha of BRH together with K fertilizere0
Outcome: FTYe0
Direction: decreasee0

Not reportedComparator

Verbatim

e0
“The use of 25.0 t/ha of BRH together with K fertilizer reduced the uptake of Mg and Ca, resulting in a significant adverse decrease in the FTY”
✓ located verbatim in the source · abstract, characters 1128–1270

t0
“cassava”
✓ located verbatim in the source · title, characters 73–80

Title

Potential use of burnt rice husk to substitute for potassium applied for cassava grown in a low K-reserve soil

Agriculture and Natural Resources 2024. doi:10.34044/j.anres.2024.58.2.12

Other claims from this paper (12)

Intervention effect Sole burnt rice husk application did not significantly change fresh tuber yield relative to the control.
Intervention effect Sole potassium fertilizer application did not significantly change fresh tuber yield relative to the control.
Intervention effect Burnt rice husk increased soil potassium availability.
Intervention effect Combined burnt rice husk and potassium fertilizer rates increased fresh tuber yield by 62.6-170% over the control.
Intervention effect The highest fresh tuber yield occurred with 12.5 t/ha burnt rice husk and 100 kg K 2 O/ha.
Intervention effect Using 25.0 t/ha burnt rice husk with potassium fertilizer reduced magnesium uptake.
Intervention effect Using 25.0 t/ha burnt rice husk with potassium fertilizer reduced calcium uptake.
Intervention effect The interaction of burnt rice husk and potassium fertilizer had no clear effect on starch yield.
Intervention effect The interaction of burnt rice husk and potassium fertilizer had no clear effect on aboveground biomass.
Intervention effect The combined treatment stimulated uptake of some plant nutrients.
Intervention effect Burnt rice husk partly substituted for applied potassium in cassava growth.
Recommendation Potassium fertilizer remained necessary when burnt rice husk was applied below 12.5 t/ha.

Associationobservedoriginal resultnegativesignificant (as stated)measured

Claim · model-written summary

Methane showed a long-term significant association with cassava yield damage larger than that of any other greenhouse gas or climatic variable studied.

Taxon: cassavaManihot esculentae2
Compound: methanee2
Outcome: cassava yielde2
Direction: decreaseinferrede2
Qualifier: long-terme2
Comparator: any other greenhouse gas and climatic variablese2

Verbatim

e2
“The study also noted that methane causes long-term significant damage to cassava yield more than any other greenhouse gas and climatic variables in the study”
✓ located verbatim in the source · abstract, characters 1056–1213

Title

Impact of Climate Change on Cassava Yield in Nigeria: An Autoregressive Distributed Lag Bound Approach

Casmir Ndukaku Anyaegbu; Kingsley Ezechukwu Okpara; Wirach Taweepreda; et al. Agriculture 2022. doi:10.3390/agriculture13010080

Other claims from this paper (2)

Associationobservedoriginal resultnegativesignificant (as stated)measured

Claim · model-written summary

Age had a significant adverse effect on cassava output.

Taxon: cassavaManihot esculentae0
Treatment: agee4
Outcome: outpute4
Direction: decreaseinferrede4

Verbatim

e0
“Findings showed that poor yield due to bad weather conditions and inadequate transportation systems were the most intense risks faced by cassava farmers”
✓ located verbatim in the source · abstract, characters 851–1003

e4
“age as a variable was significant but had adverse effects on output”
✓ located verbatim in the source · abstract, characters 1479–1546

Title

Analysis of risk management practices among cassava farmers in Ideato south local government area, Imo State, Nigeria

EA Ajah; UI Ofem; EB Effa; et al. African Journal of Food Agriculture Nutrition and Development 2022. doi:10.18697/ajfand.108.19080

Other claims from this paper (7)

Associationobservedoriginal resultsignificant (as stated)measured

Claim · model-written summary

Land ownership had a significant negative effect on adoption of improved cassava varieties at the 5% level.

Taxon: cassavaManihot esculentat0
Treatment: Land ownershipe7
Outcome: adoption of improved varietiese6
Direction: decreaseinferrede7

Verbatim

t0
“improved cassava varieties”
✓ located verbatim in the source · title, characters 29–55

e6
“The coefficient for gender, cassava yield and farming experience were positivelyrelated to adoption of improved varieties”
✓ located verbatim in the source · abstract, characters 2711–2832

e7
“Land ownership on the other hand had negative effect, significant at 5% level of probability”
✓ located verbatim in the source · abstract, characters 2997–3089

Title

Commercial-scale adoption of improved cassava varieties: A baseline study to highlight constraints of large-scale cassava based agro-processing industries in Southern Nigeria

G. Tarawali; Charles Iyangbe; Udensi Ekea Udensi; et al. CGSPace A Repository of Agricultural Research Outputs (Consultative Group for International Agricultural Research) 2012

Other claims from this paper (11)

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