Abstract
SUMMARY Soil erosion and the productivity of cassava ( Manihot esculenta Crantz) cropping systems, including forage legume intercropping, were monitored under natural rainfall conditions on Inceptisols in southwest Colombia. Trials were conducted over two cropping periods on moderate slopes. The best erosion control and cassava fresh root yields were achieved by sole cropping on contour ridges. Erosion was greater with forage legume intercropping than with cassava sole cropping in the first cropping period but once well established and uniformly distributed, undersown legumes controlled erosion effectively, though yields of cassava were depressed by 40% or more. Dense stands of grass contour barriers decreased erosion to tolerable levels. Lower cassava yields due to reduced cropping area and competition from the grasses could be compensated for by the production of valuable forage and by increasing cassava planting density.
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Claims 8
Claim · model-written summary
Sole cropping on contour ridges gave the best erosion control.
- Taxon
- cassava
Manihot esculentae0 - Treatment
- sole cropping on contour ridgese0
- Outcome
- erosion controle0
- Direction
- beste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The best erosion control and cassava fresh root yields were achieved by sole cropping on contour ridges.”
Claim · model-written summary
Sole cropping on contour ridges gave the best cassava fresh root yields.
- Taxon
- cassavaManihot esculentae0
- Treatment
- sole cropping on contour ridgese0
- Outcome
- cassava fresh root yieldse0
- Direction
- beste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The best erosion control and cassava fresh root yields were achieved by sole cropping on contour ridges.”
Claim · model-written summary
Forage legume intercropping caused greater erosion than sole cassava in the first cropping period.
- Taxon
- cassavaManihot esculentae0
- Treatment
- forage legume intercroppinge0
- Outcome
- Erosione0
- Direction
- greatere0
- Qualifier
- first cropping periode0
- Comparator
- cassava sole croppinge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Erosion was greater with forage legume intercropping than with cassava sole cropping in the first cropping period”
Claim · model-written summary
Established, uniformly distributed undersown legumes controlled erosion effectively.
- Taxon
- CassavaManihot esculentat0
- Treatment
- undersown legumese0
- Outcome
- erosione0
- Direction
- controllede0
- Qualifier
- once well established and uniformly distributede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“once well established and uniformly distributed, undersown legumes controlled erosion effectively”
t0“Cassava”
Claim · model-written summary
Undersown legumes depressed cassava yield by at least 40%.
- Taxon
- cassavaManihot esculentae0
- Treatment
- undersown legumese0
- Outcome
- yields of cassavae0
- Direction
- depressede0
- Value
- 40% or moree0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“undersown legumes controlled erosion effectively, though yields of cassava were depressed by 40% or more.”
t0“Cassava”
Claim · model-written summary
Dense grass contour barriers decreased erosion to tolerable levels.
- Taxon
- CassavaManihot esculentat0
- Treatment
- Dense stands of grass contour barrierse0
- Outcome
- erosione0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Dense stands of grass contour barriers decreased erosion to tolerable levels.”
t0“Cassava”
Claim · model-written summary
Grass competition and reduced cropping area lowered cassava yields.
- Taxon
- cassavaManihot esculentae0
- Interactor
- grassese0weed
- Outcome
- Lower cassava yieldse0
- Qualifier
- reduced cropping area and competition from the grassese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Lower cassava yields due to reduced cropping area and competition from the grasses could be compensated for by the production of valuable forage and by increasing cassava planting density.”
Claim · model-written summary
The authors suggest forage production and increased cassava density can compensate for lower yields.
- Taxon
- cassavaManihot esculentae0
- Outcome
- compensated for by the production of valuable forage and by increasing cassava planting densitye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Lower cassava yields due to reduced cropping area and competition from the grasses could be compensated for by the production of valuable forage and by increasing cassava planting density.”
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 →intercropping · soil: physics · Manihot esculenta (cassava)Positive and negative results
6 in the opposite direction
- positive
- positive
- positive
3 papers more in this group
See all 7 papers →trap barrier · soil: physics · Manihot esculenta (cassava)Results agree
2 papers in the same direction as this paper
- positive
- positive
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.