Abstract
Summary The influence of no‐tillage and conventional tillage on the outcome of early weed interference in maize ( Zea mays L., cv. TZB), cowpea [ Vigna unguiculata (L.) Walp, cv. VITA‐5] and their intercrop at populations of 40000, 50 000 and 30 000 + 40 000 plants ha −1 was investigated on a loamy sand Oxic Ustropept in a subhumid tropical environment between April and July 1980. Both tillage treatments received 60 kg N, 30 kg P 2 O 5 and 30 kg K 2 O ha −1 . Although the weed spectrum was wider under no‐tillage, weed weight was only 52% of the weight recorded under conventional tillage 6 weeks after sowing and the average food energy yield reductions caused were 28 and 65%, respectively. Cropping pattern had no effect on plot weediness. With minimum or no weed interference, maize performance was better in conventional than no‐tillage but worse with prolonged weed interference. Cowpea responded more to weed interference than to tillage practice. Regardless of tillage practice and weed interference duration (up to 6 weeks) after sowing, maize monoculture produced the highest food energy yield, followed by maize/cowpea intercrop and cowpea monoculture in that order.
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Claims 9
Claim · model-written summary
No-tillage had a wider weed spectrum than conventional tillage.
- Taxon
- maize, cowpea
Vigna unguiculata
Zea mayst0 - Treatment
- no‐tillagee0
- Interactor
- weede0weed
- Outcome
- weed spectrume0
- Direction
- widere0
- Comparator
- conventional tillagee1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the weed spectrum was wider under no‐tillage”
e1“influence of no‐tillage and conventional tillage”
t0“maize, cowpea”
Claim · model-written summary
Weed weight under no-tillage was 52% of conventional tillage at six weeks.
- Taxon
- maize, cowpeaVigna unguiculataZea mayst0
- Treatment
- no‐tillagee1
- Interactor
- weede0weed
- Outcome
- weed weighte0
- Direction
- onlye0
- Value
- 52%e0
- Comparator
- conventional tillagee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“weed weight was only 52% of the weight recorded under conventional tillage 6 weeks after sowing”
e1“The influence of no‐tillage and conventional tillage”
t0“maize, cowpea”
Claim · model-written summary
Weeds reduced food energy yield by 28% under no-tillage.
- Taxon
- maize, cowpeaVigna unguiculataZea mayst0
- Treatment
- no‐tillagee0
- Interactor
- weede0weed
- Outcome
- food energy yield reductionse0
- Direction
- reductionse0
- Value
- 28e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“under no‐tillage, weed weight was only 52% of the weight recorded under conventional tillage 6 weeks after sowing and the average food energy yield reductions caused were 28 and 65%, respectively”
t0“maize, cowpea”
Claim · model-written summary
Weeds reduced food energy yield by 65% under conventional tillage.
- Taxon
- maize, cowpeaVigna unguiculataZea mayst0
- Treatment
- conventional tillagee0
- Interactor
- weede1weed
- Outcome
- food energy yield reductionse0
- Direction
- reductionse0
- Value
- 65%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“under conventional tillage 6 weeks after sowing and the average food energy yield reductions caused were 28 and 65%, respectively”
e1“the weed spectrum was wider under no‐tillage”
t0“maize, cowpea”
Claim · model-written summary
Cropping pattern had no effect on plot weediness.
- Taxon
- maize, cowpeaVigna unguiculataZea mayst0
- Treatment
- Cropping patterne0
- Interactor
- weede0weed
- Outcome
- plot weedinesse0
- Direction
- no effecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cropping pattern had no effect on plot weediness”
t0“maize, cowpea”
Claim · model-written summary
With little weed interference, maize performed better under conventional tillage than no-tillage.
- Treatment
- conventionale0
- Interactor
- weede0weed
- Outcome
- maize performancee0
- Direction
- bettere0
- Qualifier
- minimum or no weed interferencee0
- Comparator
- no‐tillagee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“With minimum or no weed interference, maize performance was better in conventional than no‐tillage”
Claim · model-written summary
With prolonged weed interference, maize performed worse under conventional tillage than no-tillage.
- Treatment
- conventionale0
- Interactor
- weede0weed
- Outcome
- maize performancee0
- Direction
- worsee0
- Qualifier
- prolonged weed interferencee0
- Comparator
- no‐tillagee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“maize performance was better in conventional than no‐tillage but worse with prolonged weed interference”
Claim · model-written summary
Cowpea responded more to weed interference than to tillage practice.
- Taxon
- CowpeaVigna unguiculatae0
- Interactor
- weede0weed
- Outcome
- responded moree0
- Direction
- moree0
- Comparator
- tillage practicee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cowpea responded more to weed interference than to tillage practice”
Claim · model-written summary
Maize monoculture had the highest food energy yield across tillage and weed interference duration.
- Material
- maize monoculturee0
- Outcome
- food energy yielde0
- Direction
- higheste0
- Comparator
- maize/cowpea intercrop and cowpea monoculturee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Regardless of tillage practice and weed interference duration (up to 6 weeks) after sowing, maize monoculture produced the highest food energy yield, followed by maize/cowpea intercrop and cowpea monoculture in that order”
The same questions in other papers
tillage · weed · Vigna unguiculata (cowpea)Positive and negative results
2 papers in the same direction as this paper · 1 in the opposite direction
- no effect
- positive
- positive
tillage · weed · Zea mays (maize)Positive and negative results
64 papers in the same direction as this paper · 41 in the opposite direction · 5 reporting no difference from an alternative
- negative
- negative
- negative
107 papers more in this group
See all 111 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.