Abstract
Abstract The effects of weed competition on cassava yield were assessed using two sets of treatments. In the first set, plots were kept weed free for specified periods and then weeds were allowed to grow. In the second set, weeds were allowed to grow initially for specified periods and were then eradicated. Effects were assessed from fresh weights of cassava roots, and weed species commonly found in the plots were identified. The work was done in the rain forest zone of western Nigeria. The predominant weed species were mainly annual broad-leaved species and competition from weeds at any period of growth after rooting reduced yield. The most damaging effect on yield was noted during early canopy formation and early tuberisation (third month after planting) and a less damaging effect from the fourth month until harvest. Where labour is a limiting factor in cassava production labour input should be applied during the third month after planting to control weed growth. Weeding during this period was as effective in ensuring a high yield of cassava roots than weeding throughout the entire period of growth.
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Claims 5
Claim · model-written summary
Weed competition after rooting reduced cassava yield.
- Taxon
- Cassava
Manihot esculentat0 - Treatment
- competition from weedse0
- Interactor
- weedse0weed
- Outcome
- yielde0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Cassava”
e0“competition from weeds at any period of growth after rooting reduced yield”
Claim · model-written summary
Weed competition was most damaging to yield in the third month after planting.
- Taxon
- CassavaManihot esculentat0
- Outcome
- effect on yielde0
- Direction
- most damaginge0
- Qualifier
- third month after plantinge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Cassava”
e0“The most damaging effect on yield was noted during early canopy formation and early tuberisation (third month after planting)”
Claim · model-written summary
Weed competition was less damaging from the fourth month to harvest.
- Taxon
- CassavaManihot esculentat0
- Outcome
- damaging effecte0
- Direction
- less damaginge0
- Qualifier
- fourth month until harveste0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Cassava”
e0“a less damaging effect from the fourth month until harvest”
Claim · model-written summary
Weeding in the third month was as effective for high root yield as weeding throughout growth.
- Taxon
- CassavaManihot esculentat0
- Treatment
- Weeding during this periode0
- Outcome
- yield of cassava rootse0
- Direction
- as effectivee0
- Comparator
- weeding throughout the entire period of growthe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Cassava”
e0“Weeding during this period was as effective in ensuring a high yield of cassava roots than weeding throughout the entire period of growth”
Claim · model-written summary
The authors recommend weed control in the third month when labour is limited.
- Taxon
- CassavaManihot esculentat0
- Outcome
- labour input should be applied during the third month after planting to control weed growthe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Cassava”
e0“Where labour is a limiting factor in cassava production labour input should be applied during the third month after planting to control weed growth”
The same questions in other papers
herbicide · yield · Manihot esculenta (cassava)Positive and negative results
18 papers in the same direction as this paper · 5 in the opposite direction · 1 reporting no difference from an alternative
- positive
- positive
- negative
21 papers more in this group
See all 25 papers →competition · yield · Manihot esculenta (cassava)Results agree
1 paper in the same direction as this paper
- negative
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.