Abstract
A longterm experiment was conducted on Alfisols at Ibadan, Nigeria, to assess agricultural productivity and sustainability of different farming systems. The experiment, conducted for a 10 year period from 1979 to 1988, was implemented in two phases. The effects of methods of land clearing on crop growth-yield were evaluated during Phase I from 1979 to 1982. Effects of different farming systems on agronomic productivity were evaluated in Phase II from 1983 to 1988. Six land clearing-cum-tillage treatments evaluated in Phase I were: (i) manual clearing with no-till, (ii) manual clearing with plow-till, (iii) shearblade clearing with no-till, (iv) treepusher/rootrake clearing with no-till, (v) treepusher/rootrake clearing with plow-till, and (vi) traditional farming. Similarly, six farming systems evaluated in Phase II were: (i) alley cropping with Leucaena leucocephala, (ii) Mucuna fallowing on severely degraded soils (iii) Mucuna fallowing on moderately degraded soil, (iv) ley farming on severely degraded soil, (v) ley farming on moderately degraded soil, and (vi) natural fallow control. In Phase I, yields of maize (Zea mays), cowpea (Vigna unguiculata) and cassava (Manihoc esculenta) were higher on manually cleared with no-till and shearblade cleared with no-till treatments than on other treatments. In Phase II, maize growth was higher on plots with Mucuna fallowing than in alley cropping or ley farming treatments. In contrast, cowpea growth was higher on alley cropped plots. Regardless of the farming system, maize grain yield declined with the cultivation duration. The relative decline in cowpea grain yield with cultivation duration was less than that of maize.
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Claims 7
Claim · model-written summary
Maize yield was higher on manually cleared no-till and shearblade cleared no-till plots than on other treatments.
- Treatment
- manually cleared with no-till and shearblade cleared with no-tille1
- Outcome
- yieldse1
- Direction
- highere1
- Comparator
- other treatmentse1
- Setting
- Ibadan, Nigeriae0
Zea maysOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“conducted on Alfisols at Ibadan, Nigeria”
e1“In Phase I, yields of maize (Zea mays), cowpea (Vigna unguiculata) and cassava (Manihoc esculenta) were higher on manually cleared with no-till and shearblade cleared with no-till treatments than on other treatments”
Claim · model-written summary
Cowpea yield was higher on manually cleared no-till and shearblade cleared no-till plots than on other treatments.
- Taxon
- cowpea
Vigna unguiculatae1 - Treatment
- manually cleared with no-till and shearblade cleared with no-tille1
- Outcome
- yieldse1
- Direction
- highere1
- Comparator
- other treatmentse1
- Setting
- Ibadan, Nigeriae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“conducted on Alfisols at Ibadan, Nigeria”
e1“In Phase I, yields of maize (Zea mays), cowpea (Vigna unguiculata) and cassava (Manihoc esculenta) were higher on manually cleared with no-till and shearblade cleared with no-till treatments than on other treatments”
Claim · model-written summary
Cassava yield was higher on manually cleared no-till and shearblade cleared no-till plots than on other treatments.
- Taxon
- cassava
Manihot esculentae1 - Treatment
- manually cleared with no-till and shearblade cleared with no-tille1
- Outcome
- yieldse1
- Direction
- highere1
- Comparator
- other treatmentse1
- Setting
- Ibadan, Nigeriae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“conducted on Alfisols at Ibadan, Nigeria”
e1“In Phase I, yields of maize (Zea mays), cowpea (Vigna unguiculata) and cassava (Manihoc esculenta) were higher on manually cleared with no-till and shearblade cleared with no-till treatments than on other treatments”
Claim · model-written summary
In Phase II, maize growth was higher with Mucuna fallowing than with alley cropping or ley farming.
- Treatment
- Mucuna fallowinge1
- Outcome
- maize growthe1
- Direction
- highere1
- Comparator
- alley cropping or ley farming treatmentse1
- Setting
- Ibadan, Nigeriae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“conducted on Alfisols at Ibadan, Nigeria”
e1“In Phase II, maize growth was higher on plots with Mucuna fallowing than in alley cropping or ley farming treatments”
Claim · model-written summary
In Phase II, cowpea growth was higher on alley cropped plots.
- Taxon
- cowpeaVigna unguiculatae1
- Treatment
- alley cropped plotse1
- Outcome
- cowpea growthe1
- Direction
- highere1
- Setting
- Ibadan, Nigeriae0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“conducted on Alfisols at Ibadan, Nigeria”
e1“In contrast, cowpea growth was higher on alley cropped plots”
Claim · model-written summary
Maize grain yield declined with cultivation duration, regardless of the farming system.
- Treatment
- cultivation duratione1
- Outcome
- maize grain yielde1
- Direction
- declinede1
- Qualifier
- Regardless of the farming systeme1
- Setting
- Ibadan, Nigeriae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“conducted on Alfisols at Ibadan, Nigeria”
e1“Regardless of the farming system, maize grain yield declined with the cultivation duration”
Claim · model-written summary
The relative decline in cowpea grain yield with cultivation duration was less than that of maize.
- Taxon
- cowpeaVigna unguiculatae1
- Treatment
- cultivation duratione1
- Outcome
- relative decline in cowpea grain yielde1
- Direction
- lesse1
- Comparator
- maizee1
- Setting
- Ibadan, Nigeriae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“conducted on Alfisols at Ibadan, Nigeria”
e1“The relative decline in cowpea grain yield with cultivation duration was less than that of maize”
The same questions in other papers
Mucuna · growth · Zea mays (maize)Positive and negative results
1 paper in the same direction as this paper · 1 in the opposite direction
- no effect
- positive
tillage · yield · Vigna unguiculata (cowpea)Results differ
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- negative
- negative
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See all 35 papers →tillage · yield · Manihot esculenta (cassava)Positive and negative results
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- no effect
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34 papers in the same direction as this paper · 12 in the opposite direction
- negative
- negative
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See all 47 papers →tillage · yield · Zea mays (maize)Positive and negative results
811 papers in the same direction as this paper · 230 in the opposite direction · 57 reporting no difference from an alternative
- no effect
- negative
- no effect
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See all 1,099 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.