Abstract
Summary Fallow management is a major strategy for weed control and soil fertility restoration in tropical farming systems. From 1995 to 1998, weed infestation was evaluated in plots managed under 0, 1, 2 and 3 year fallow durations of (1) a natural bush fallow dominated by Chromolaena odorata ; (2) a planted Mucuna pruriens fallow; and (3) a modified bush fallow without C. odorata . The study was conducted at the Nigerian Institute for Oil Palm Research (NIFOR), Benin City, Nigeria. The 3 × 4 factorial experiment was set up in a split plot arrangement. The three fallow types were the main plots and the four fallow durations were the subplots. Each year, the subplots were planted to maize ( Zea mays , cv. TZSR‐W) as appropriate and harvested 14 weeks after planting for yield comparison. Continuous cropping and the modified natural bush fallow increased weed diversity and biomass. Irrespective of fallow type, weed infestation was more gradual in the first year of cropping after fallow than in subsequent cropping years. Regardless of cropping intensity, C. odorata and M. pruriens fallows promoted broad‐leaved weeds, chiefly Ageratum conyzoides , Tridax procumbens and Phyllanthus amarus , whereas the modified bush fallow promoted grasses. Maize grain yield was higher in the C. odorata and M. pruriens fallows than in the modified bush fallow, but the yield difference diminished with cropping intensity.
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Claims 8
Claim · model-written summary
Continuous cropping increased weed diversity and biomass.
Zea maysNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Continuous cropping and the modified natural bush fallow increased weed diversity and biomass.”
t0“planted to maize ( Zea mays , cv. TZSR‐W)”
Claim · model-written summary
Modified natural bush fallow increased weed diversity and biomass.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Continuous cropping and the modified natural bush fallow increased weed diversity and biomass.”
t0“planted to maize ( Zea mays , cv. TZSR‐W)”
Claim · model-written summary
Weed infestation grew more gradually in the first cropping year after fallow than later years.
- Outcome
- weed infestatione0
- Direction
- more graduale0
- Qualifier
- first year of cropping after fallowe0
- Comparator
- subsequent cropping yearse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“weed infestation was more gradual in the first year of cropping after fallow than in subsequent cropping years.”
t0“planted to maize ( Zea mays , cv. TZSR‐W)”
Claim · model-written summary
Chromolaena odorata fallow promoted broad-leaved weeds.
- Treatment
- C. odoratae0
- Interactor
- Ageratum conyzoides
Ageratum conyzoidese0weed - Outcome
- broad‐leaved weedse0
- Direction
- promotede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“C. odorata and M. pruriens fallows promoted broad‐leaved weeds, chiefly Ageratum conyzoides , Tridax procumbens and Phyllanthus amarus”
t0“planted to maize ( Zea mays , cv. TZSR‐W)”
Claim · model-written summary
Mucuna pruriens fallow promoted broad-leaved weeds.
- Treatment
- M. pruriense0
- Interactor
- Ageratum conyzoidesAgeratum conyzoidese0weed
- Outcome
- broad‐leaved weedse0
- Direction
- promotede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“C. odorata and M. pruriens fallows promoted broad‐leaved weeds, chiefly Ageratum conyzoides , Tridax procumbens and Phyllanthus amarus”
t0“planted to maize ( Zea mays , cv. TZSR‐W)”
Claim · model-written summary
Modified bush fallow promoted grasses.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the modified bush fallow promoted grasses.”
t0“planted to maize ( Zea mays , cv. TZSR‐W)”
Claim · model-written summary
Maize grain yield was higher after C. odorata fallow than modified bush fallow.
- Treatment
- C. odoratae0
- Outcome
- grain yielde0
- Direction
- highere0
- Qualifier
- yield difference diminished with cropping intensitye0
- Comparator
- modified bush fallowe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Maize grain yield was higher in the C. odorata and M. pruriens fallows than in the modified bush fallow, but the yield difference diminished with cropping intensity.”
Claim · model-written summary
Maize grain yield was higher after M. pruriens fallow than modified bush fallow.
- Treatment
- M. pruriense0
- Outcome
- grain yielde0
- Direction
- highere0
- Qualifier
- yield difference diminished with cropping intensitye0
- Comparator
- modified bush fallowe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Maize grain yield was higher in the C. odorata and M. pruriens fallows than in the modified bush fallow, but the yield difference diminished with cropping intensity.”
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See all 26 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.