Abstract
Tillage operations have a major influence on the penetration resistance and physical characteristics of soils, roots growth, biomass and grain yield of tropical crops. Field experiment was conducted on sandy clay loam soil of Akure in the south west of Nigeria to determine the influence of different tillage systems on soil bulk density, penetration resistance, moisture content and growth characteristics of cowpea. There were three soil treatments plots A, B and C each with 5 x 11.2 m2 dimension. The treatment applied on plot A was zero-tillage treatment (ZT) using paraquat herbicide, plot B had Minimum tillage (MT) using light implement (cutlass and hoe) while the plot C was under conventional tillage system (CT) using tractor mounted disc plough. The soil tillage treatments were replicated four times in a randomized complete block design totalling 12 plots. Zero-tillage progressively increased soil bulk density between 1.59 g cm-3 to 1.91 g cm-3 at the 0-30 cm soil depth. Highest moisture content of 15.98 % was obtained at the 0 – 10 cm soil layer in plots under zero tillage at the 5 weeks after planting (5WAP). During the 5th week after planting, soil penetration resistance ranged from 710 kPa under zero tillage to 680 kPa under minimum tillage and 340 kPa under disc ploughed plots (conventional tillage). Disc ploughed plots which produced the lowest soil penetration resistance gave the best cowpea (Vigna unguiculata) yield, an indication of the need for soil pulverization to enhance crop growth and yield. The results show that tillage treatments affect moisture retention, especially at 20 – 30 cm soil layers and thus the ease of cowpea roots penetration resulting in improved cowpea growth and yield parameters. The highest grain yield of cowpea with mean value of 0.64 (±0.03) t ha-1 was obtained in plots under convectional tillage treatment. The mean grain yield of 0.52 (±0.03) t ha-1 was recorded in plots under minimum tillage while zero tillage revealed a mean yield value of 0.41(±0.02) t ha-1. Finding from the research showed that the yield and yield components of cowpea were raised in the plots under conventional tillage system compared with other tillage systems.
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Claims 6
Claim · model-written summary
Zero tillage increased soil bulk density to 1.91 g cm-3 at 0–30 cm.
- Taxon
- Cowpea
Vigna unguiculatat0 - Treatment
- Zero-tillagee0
- Outcome
- soil bulk densitye0
- Direction
- increasede0
- Value
- 1.59 g cm-3 to 1.91 g cm-3e0
Not reportedOrgan / stageComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Zero-tillage progressively increased soil bulk density between 1.59 g cm-3 to 1.91 g cm-3 at the 0-30 cm soil depth”
t0“Cowpea (Vigna unguiculata)”
Claim · model-written summary
Zero tillage had the highest soil moisture of 15.98% at 0–10 cm after five weeks.
- Taxon
- CowpeaVigna unguiculatat0
- Treatment
- zero tillagee0
- Outcome
- moisture contente0
- Direction
- Higheste0
- Value
- 15.98 %e0
- Qualifier
- 5 weeks after plantinge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Highest moisture content of 15.98 % was obtained at the 0 – 10 cm soil layer in plots under zero tillage at the 5 weeks after planting (5WAP)”
t0“Cowpea (Vigna unguiculata)”
Claim · model-written summary
Penetration resistance was 710 kPa under zero tillage, 680 kPa under minimum tillage and 340 kPa under conventional tillage.
- Taxon
- CowpeaVigna unguiculatat0
- Outcome
- soil penetration resistancee0
- Value
- 710 kPa under zero tillage to 680 kPa under minimum tillage and 340 kPae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“soil penetration resistance ranged from 710 kPa under zero tillage to 680 kPa under minimum tillage and 340 kPa under disc ploughed plots (conventional tillage)”
t0“Cowpea (Vigna unguiculata)”
Claim · model-written summary
Conventional tillage produced the highest cowpea grain yield of 0.64 t ha-1.
- Taxon
- cowpeaVigna unguiculatae0
- Treatment
- convectional tillage treatmente0
- Outcome
- grain yield of cowpeae0
- Direction
- higheste0
- Value
- 0.64 (±0.03) t ha-1e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The highest grain yield of cowpea with mean value of 0.64 (±0.03) t ha-1 was obtained in plots under convectional tillage treatment”
Claim · model-written summary
Minimum tillage yielded 0.52 t ha-1.
- Taxon
- CowpeaVigna unguiculatat0
- Treatment
- minimum tillagee0
- Outcome
- mean grain yielde0
- Value
- 0.52 (±0.03) t ha-1e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The mean grain yield of 0.52 (±0.03) t ha-1 was recorded in plots under minimum tillage”
t0“Cowpea (Vigna unguiculata)”
Claim · model-written summary
Zero tillage yielded 0.41 t ha-1.
- Taxon
- CowpeaVigna unguiculatat0
- Treatment
- zero tillagee0
- Outcome
- mean yielde0
- Value
- 0.41(±0.02) t ha-1e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“zero tillage revealed a mean yield value of 0.41(±0.02) t ha-1”
t0“Cowpea (Vigna unguiculata)”
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tillage · yield · Vigna unguiculata (cowpea)Results differ
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See all 6 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.