Abstract
Mulching the surface of soil after machinery traffic can offset some of the adverse effect of compaction of the soil caused by the machine. Thus, this study reported the response of cowpea (vigna-unguiculata) to compaction and mulching with elephant grass (Pennisectum purpuereum) on loamy sand soil in Southern Nigeria. A randomized split-block design of field plots with compaction levels as the main block and the mulching levels as the sub-block was used. The compaction treatment consisted of 0, 5, 10 and 15 passes of a tractor with a 31 kPa contact pressure while the mulching treatment consisted of 0%, 30%, 60% and 90% areal ground cover. The zero percent treatment served as control and each treatment was replicated twice. The soil dry bulk density, penetration resistance, soil moisture content and crop growth and yield parameters were measured. Results showed that compaction level significantly increased the dry bulk density, penetration resistance and reduced soil moisture content, crop growth and yield parameters; while mulching significantly increased soil moisture content, dry bulk density and reduced penetration resistance (P<0.05). The growth and yield parameter increased for 30% mulch cover and thereafter reduced for 60% and 90% mulch cover. Both the crop dry matter and grain yield had significant correlation (R2 = 0.93 and 0.96, respectively) with mulch cover and compaction using surface response analysis. Multiple regressions showed that a ground cover of 40% will be optimum for cowpea production on uncompacted soil while up to 65% and 92% will be needed to complement the 5 and 10 passes of tractor to produce comparative yields respectively. Keywords: cowpea, tractor traffic, mulch cover, yield parameters, dry bulk density, penetration resistance
Abstract from the paper’s OpenAlex record; open copy licensed other-oa.
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 13
Claim · model-written summary
Tractor compaction increased soil dry bulk density and penetration resistance in cowpea plots.
- Taxon
- Cowpea
Vigna unguiculatat0 - Treatment
- compaction levele0
- Outcome
- dry bulk density, penetration resistancee0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Cowpea”
e0“compaction level significantly increased the dry bulk density, penetration resistance and reduced soil moisture content, crop growth and yield parameters”
Claim · model-written summary
Tractor compaction reduced soil moisture content in cowpea plots.
- Taxon
- CowpeaVigna unguiculatat0
- Treatment
- compaction levele0
- Outcome
- soil moisture contente0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Cowpea”
e0“compaction level significantly increased the dry bulk density, penetration resistance and reduced soil moisture content, crop growth and yield parameters”
Claim · model-written summary
Tractor compaction reduced cowpea growth and yield parameters.
- Taxon
- CowpeaVigna unguiculatat0
- Treatment
- compaction levele0
- Outcome
- crop growth and yield parameterse0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Cowpea”
e0“compaction level significantly increased the dry bulk density, penetration resistance and reduced soil moisture content, crop growth and yield parameters”
Claim · model-written summary
Mulching increased soil moisture content and dry bulk density in cowpea plots.
- Taxon
- CowpeaVigna unguiculatat0
- Treatment
- mulchinge0
- Outcome
- soil moisture content, dry bulk densitye0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Cowpea”
e0“mulching significantly increased soil moisture content, dry bulk density and reduced penetration resistance (P<0.05)”
Claim · model-written summary
Mulching reduced soil penetration resistance in cowpea plots.
- Taxon
- CowpeaVigna unguiculatat0
- Treatment
- mulchinge0
- Outcome
- penetration resistancee0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Cowpea”
e0“mulching significantly increased soil moisture content, dry bulk density and reduced penetration resistance (P<0.05)”
Claim · model-written summary
Cowpea growth and yield parameters increased with 30% mulch cover.
- Taxon
- CowpeaVigna unguiculatat0
- Treatment
- 30% mulch covere0
- Outcome
- growth and yield parametere0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Cowpea”
e0“The growth and yield parameter increased for 30% mulch cover and thereafter reduced for 60% and 90% mulch cover”
Claim · model-written summary
Cowpea growth and yield parameters declined at 60% mulch cover.
- Taxon
- CowpeaVigna unguiculatat0
- Treatment
- 60%e0
- Outcome
- growth and yield parametere0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Cowpea”
e0“The growth and yield parameter increased for 30% mulch cover and thereafter reduced for 60% and 90% mulch cover”
Claim · model-written summary
Cowpea growth and yield parameters declined at 90% mulch cover.
- Taxon
- CowpeaVigna unguiculatat0
- Treatment
- 90% mulch covere0
- Outcome
- growth and yield parametere0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Cowpea”
e0“The growth and yield parameter increased for 30% mulch cover and thereafter reduced for 60% and 90% mulch cover”
Claim · model-written summary
Crop dry matter correlated with mulch cover and compaction, with R2 = 0.93.
- Taxon
- CowpeaVigna unguiculatat0
- Treatment
- mulch cover and compactione0
- Outcome
- crop dry mattere0
- Value
- R2 = 0.93e0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Cowpea”
e0“Both the crop dry matter and grain yield had significant correlation (R2 = 0.93 and 0.96, respectively) with mulch cover and compaction using surface response analysis”
Claim · model-written summary
Grain yield correlated with mulch cover and compaction, with R2 = 0.96.
- Taxon
- CowpeaVigna unguiculatat0
- Treatment
- mulch cover and compactione0
- Outcome
- grain yielde0
- Value
- 0.96e0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Cowpea”
e0“Both the crop dry matter and grain yield had significant correlation (R2 = 0.93 and 0.96, respectively) with mulch cover and compaction using surface response analysis”
Claim · model-written summary
Response analysis estimated 40% ground cover as optimal for cowpea on uncompacted soil.
- Taxon
- CowpeaVigna unguiculatat0
- Treatment
- ground covere0
- Outcome
- cowpea productione0
- Value
- 40%e0
- Qualifier
- uncompacted soile0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Cowpea”
e0“a ground cover of 40% will be optimum for cowpea production on uncompacted soil”
Claim · model-written summary
Response analysis estimated 65% cover was needed to complement five tractor passes for comparable cowpea yield.
- Taxon
- CowpeaVigna unguiculatat0
- Outcome
- comparative yieldse0
- Value
- 65%e0
- Qualifier
- 5 and 10 passes of tractore0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Cowpea”
e0“up to 65% and 92% will be needed to complement the 5 and 10 passes of tractor to produce comparative yields respectively”
Claim · model-written summary
Response analysis estimated 92% cover was needed to complement ten tractor passes for comparable cowpea yield.
- Taxon
- CowpeaVigna unguiculatat0
- Outcome
- comparative yieldse0
- Value
- 92%e0
- Qualifier
- 5 and 10 passes of tractore0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Cowpea”
e0“up to 65% and 92% will be needed to complement the 5 and 10 passes of tractor to produce comparative yields respectively”
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mulching · yield · Vigna unguiculata (cowpea)Results agree
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See all 22 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.