Abstract
Cassava-groundnut intercropping is not a common practice among smallholder farmers in Sierra Leone even though both crops are well suited for intercropping. On-farm trials were conducted in three locations (Bai Largor, Bassah, and Njala Kanima) in the Moyamba district during the 2021 cropping season to investigate the efficacy of cassava-groundnut intercropping for increasing crop productivity and soil organic carbon stock on smallholder farms in the Moyamba district, Southern Sierra Leone. The experimental design was a randomized complete block design in three replications with treatments of sole groundnut, sole cassava and cassava-groundnut intercropping. Data on the yield and yield components of cassava and groundnut were analysed using the PROC MIXED procedure of SAS 9.4 and means were compared using the standard error of difference (SED). The above-ground biomass, number of roots per plant, and fresh root yield of cassava were not significantly (p > 0.05) affected by the cassava-based cropping system. Averaged across locations, intercropping cassava with groundnut decreased the above-ground biomass, the number of roots per plant, and fresh root yield of cassava by 17%, 11%, and 17%, respectively. The above-ground biomass, number of pods per plant and fresh pod yield of groundnut were significantly (p 1), the highest net revenue and benefit-cost ratio. The benefit-cost ratio was also favourable for the sole cassava (BCR > 1) but not favourable for the sole groundnut (BCR < 1). Averaged across locations, intercropping cassava with groundnut increased the benefit-cost ratio by 121% and 13% when compared to the sole groundnut and sole cassava. In the event of a 40% yield loss for the cassava and groundnut, the benefit-cost ratio was favourable (1.12) only for the cassava groundnut intercropping system. The net soil organic carbon stock was favourable only for the cassava-groundnut intercrop. Averaged across locations, the net soil organic carbon for the cassava-groundnut intercropping increased by 3.4% when compared to the baseline within one cropping cycle of the cassava (12 months). The results confirm that cassava-groundnut intercropping is a sustainable land management practice that could enhance crop productivity and soil organic carbon stock on smallholder farms.
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Claims 8
Claim · model-written summary
Intercropping lowered cassava above-ground biomass by 17% across locations without a significant cropping-system effect.
- Taxon
- cassava
Manihot esculentae0 - Treatment
- intercropping cassava with groundnute0
- Outcome
- above-ground biomasse0
- Direction
- decreasede0
- Value
- 17%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“intercropping cassava with groundnut decreased the above-ground biomass, the number of roots per plant, and fresh root yield of cassava by 17%, 11%, and 17%, respectively.”
Claim · model-written summary
Intercropping lowered cassava roots per plant by 11% across locations without a significant cropping-system effect.
- Taxon
- cassavaManihot esculentae0
- Treatment
- intercropping cassava with groundnute0
- Outcome
- number of roots per plante0
- Direction
- decreasede0
- Value
- 11%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“intercropping cassava with groundnut decreased the above-ground biomass, the number of roots per plant, and fresh root yield of cassava by 17%, 11%, and 17%, respectively.”
Claim · model-written summary
Intercropping lowered cassava fresh root yield by 17% across locations without a significant cropping-system effect.
- Taxon
- cassavaManihot esculentae0
- Treatment
- intercropping cassava with groundnute0
- Outcome
- fresh root yield of cassavae0
- Direction
- decreasede0
- Value
- 17%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“intercropping cassava with groundnut decreased the above-ground biomass, the number of roots per plant, and fresh root yield of cassava by 17%, 11%, and 17%, respectively.”
Claim · model-written summary
Intercropping raised the benefit-cost ratio by 121% against sole groundnut.
- Taxon
- cassavaManihot esculentae0
- Treatment
- intercropping cassava with groundnute0
- Outcome
- benefit-cost ratioe0
- Direction
- increasede0
- Value
- 121%e0
- Comparator
- sole groundnute0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“intercropping cassava with groundnut increased the benefit-cost ratio by 121% and 13% when compared to the sole groundnut and sole cassava.”
Claim · model-written summary
Intercropping raised the benefit-cost ratio by 13% against sole cassava.
- Taxon
- cassavaManihot esculentae0
- Treatment
- intercropping cassava with groundnute0
- Outcome
- benefit-cost ratioe0
- Direction
- increasede0
- Value
- 13%e0
- Comparator
- sole cassavae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“intercropping cassava with groundnut increased the benefit-cost ratio by 121% and 13% when compared to the sole groundnut and sole cassava.”
Claim · model-written summary
With 40% yield loss, only intercropping retained a favorable benefit-cost ratio of 1.12.
- Taxon
- cassava and groundnut
Arachis hypogaeaManihot esculentae0 - Outcome
- benefit-cost ratioe0
- Value
- 1.12e0
- Qualifier
- 40% yield losse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In the event of a 40% yield loss for the cassava and groundnut, the benefit-cost ratio was favourable (1.12) only for the cassava groundnut intercropping system.”
Claim · model-written summary
Net soil organic carbon stock was favorable only under intercropping.
Verbatim
e0“The net soil organic carbon stock was favourable only for the cassava-groundnut intercrop.”
Claim · model-written summary
Intercropping raised net soil organic carbon by 3.4% relative to baseline in 12 months.
- Taxon
- cassavaManihot esculentae0
- Treatment
- cassava-groundnut intercroppinge0
- Outcome
- net soil organic carbone0
- Direction
- increasede0
- Value
- 3.4%e0
- Qualifier
- 12 monthse0
- Comparator
- baselinee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the net soil organic carbon for the cassava-groundnut intercropping increased by 3.4% when compared to the baseline within one cropping cycle of the cassava (12 months).”
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