Abstract
On sloping lands, cassava is a food crop that often promotes severe soil erosion. Moreover, repetitive monocropping of cassava dramatically increases soil erosion and reduces soil fertility. Intercropping, a key agroecological practice, effectively manages soil erosion by increasing soil cover and improving soil fertility. In 2017, a trial was set up in Mau Dong commune, Van Yen district, Yen Bai province, Vietnam, to evaluate the feasibility of intercropping cowpea into a cassava cropping system. The results showed strong feasibility for reducing soil erosion and maintaining cassava yield. In 2018, a follow-up field experiment was undertaken to assess the effects of a cassava-cowpea intercropping on the growth and yield of cassava, and its impact on soil and nutrient losses. A completely randomized design (CRD) was adopted with 3 replications composed of 4 treatments-cassava monocropped on gentle slope, cassava monocropped on steep slope, cassava-cowpea intercropped on gentle slope, and cassava-cowpea intercropped on steep slope. The results showed that intercropping cassava with cowpea on both gentle or steep slope fields significantly improved soil cover levels (2.2 level of cover out of 10 on gentle and 1.7 on steep), reduced soil erosion (40.0% gentle and 58.2% steep) and decreased nutrient losses (15.9-35.6% nitrogen, 0-18.8% phosphorus, and 14.8-22.5% potassium). Regression analysis revealed significant correlation between dry soil erosion, percentage of soil cover, and nutrients losses. The intercropping system enhanced cassava growth, yield, harvest index, and root dry matter. Thus, cassava-cowpea intercropping system shows great potential as a strategy for soil erosion control and sustainable agricultural production.
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Claims 9
Claim · model-written summary
Intercropping was feasible for reducing erosion while maintaining cassava yield in the 2017 trial.
- Outcome
- reducing soil erosion and maintaining cassava yielde0
Not reportedTaxon
Verbatim
e0“The results showed strong feasibility for reducing soil erosion and maintaining cassava yield.”
Claim · model-written summary
Intercropping improved soil cover on gentle and steep slopes.
- Taxon
- cassava
Manihot esculentae0 - Treatment
- intercropping cassava with cowpeae0
- Outcome
- soil cover levelse0
- Direction
- improvede0
- Value
- 2.2 level of cover out of 10 on gentle and 1.7 on steepe0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“intercropping cassava with cowpea on both gentle or steep slope fields significantly improved soil cover levels (2.2 level of cover out of 10 on gentle and 1.7 on steep)”
Claim · model-written summary
Intercropping reduced soil erosion on gentle slopes by 40.0%.
Not reportedTaxonTreatmentComparator
Verbatim
e0“reduced soil erosion (40.0% gentle and 58.2% steep)”
Claim · model-written summary
Intercropping reduced soil erosion on steep slopes by 58.2%.
Not reportedTaxonTreatmentComparator
Verbatim
e0“reduced soil erosion (40.0% gentle and 58.2% steep)”
Claim · model-written summary
Intercropping decreased nitrogen loss by 15.9-35.6%.
Not reportedTaxonTreatmentComparator
Verbatim
e0“decreased nutrient losses (15.9-35.6% nitrogen, 0-18.8% phosphorus, and 14.8-22.5% potassium)”
Claim · model-written summary
Intercropping decreased phosphorus loss by 0-18.8%.
Not reportedTaxonTreatmentComparator
Verbatim
e0“decreased nutrient losses (15.9-35.6% nitrogen, 0-18.8% phosphorus, and 14.8-22.5% potassium)”
Claim · model-written summary
Intercropping decreased potassium loss by 14.8-22.5%.
Not reportedTaxonTreatmentComparator
Verbatim
e0“decreased nutrient losses (15.9-35.6% nitrogen, 0-18.8% phosphorus, and 14.8-22.5% potassium)”
Claim · model-written summary
Dry soil erosion, soil cover and nutrient losses were significantly correlated.
Not reportedTaxonSettingDirection
Verbatim
e0“Regression analysis revealed significant correlation between dry soil erosion, percentage of soil cover, and nutrients losses.”
Claim · model-written summary
Intercropping enhanced cassava growth, yield, harvest index and root dry matter.
- Taxon
- cassavaManihot esculentae0
- Treatment
- intercropping systeme0
- Outcome
- growth, yield, harvest index, and root dry mattere0
- Direction
- enhancede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The intercropping system enhanced cassava growth, yield, harvest index, and root dry matter.”
The same questions in other papers
intercropping · yield · Manihot esculenta (cassava)Results differ
47 papers in the same direction as this paper · 28 in the opposite direction · 2 reporting no difference from an alternative
- negative
- negative
- no effect
74 papers more in this group
See all 78 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.