Abstract
SUMMARY Tillage and use of organic manure are important agronomic practices that sustain high crop and soil productivity. Hence, a three-year (2007 to 2009) study was conducted to evaluate the effect of site, tillage and poultry manure (PM) treatments on soil and plant nutrients composition, growth and yield of cocoyam ( Xanthosoma sagittifolium ). The study was a 2 × 5 × 5 factorial experiment with two sites (Owo – site 1 and Obasooto – site 2), five tillage methods; manual clearing (MC), manual ridging (MR), manual mounding (MM), ploughing plus harrowing (P+H) and ploughing plus harrowing twice (P+2H) and five levels of PM (0, 2.5, 5.0, 7.5, 10.0 t ha −1 ). Treatments were replicated thrice. Soil OM, N, P, K, Ca, Mg and leaf nutrients reduced with increase in tillage intensity, thus MC conserved soil nutrients the most, and increased nutrient uptake. Soil and plant nutrient concentration was lowest under the P+2H treatment. The MC, MR and MM treatments led to faster growth and higher tuber yield. As PM increased from 0 to 10.0 t ha −1 soil pH, OM, soil and plant N, P, K, Ca and Mg increased. The 7.5 t ha −1 PM gave the highest leaf K, Ca and Mg values. Owo site had significantly higher yield and growth parameters of cocoyam compared with Obasooto site. Yield and growth parameters of cocoyam increased with increase in PM level up to 7.5 t ha −1 . Out of all tillage cum manure treatments, MC+7.5 t ha −1 PM gave the highest values of yield and growth parameters.
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Claims 12
Claim · model-written summary
Increasing tillage intensity reduced soil and leaf nutrients.
- Taxon
- COCOYAM
_Colocasia_esculenta_-_Les_Martels%2C_Giroussens_Tarn.jpg?width=60)
Colocasia esculentat0 - Treatment
- tillage intensitye0
- Outcome
- Soil OM, N, P, K, Ca, Mg and leaf nutrientse0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_Colocasia_esculenta_-_Les_Martels%2C_Giroussens_Tarn.jpg?width=500)
Verbatim
e0“Soil OM, N, P, K, Ca, Mg and leaf nutrients reduced with increase in tillage intensity”
t0“COCOYAM”
Claim · model-written summary
Manual clearing conserved soil nutrients most and increased nutrient uptake.
- Taxon
- COCOYAMColocasia esculentat0
- Treatment
- MCe0
- Outcome
- soil nutrientse0
- Direction
- conservede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“MC conserved soil nutrients the most, and increased nutrient uptake.”
t0“COCOYAM”
Claim · model-written summary
Manual clearing increased nutrient uptake.
- Taxon
- COCOYAMColocasia esculentat0
- Treatment
- MCe0
- Outcome
- nutrient uptakee0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“MC conserved soil nutrients the most, and increased nutrient uptake.”
t0“COCOYAM”
Claim · model-written summary
Soil and plant nutrient concentration was lowest under P+2H.
- Taxon
- COCOYAMColocasia esculentat0
- Treatment
- P+2H treatmente0
- Outcome
- Soil and plant nutrient concentratione0
- Direction
- loweste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Soil and plant nutrient concentration was lowest under the P+2H treatment.”
t0“COCOYAM”
Claim · model-written summary
MC, MR and MM led to faster cocoyam growth.
- Taxon
- COCOYAMColocasia esculentat0
- Treatment
- MC, MR and MM treatmentse0
- Outcome
- growthe0
- Direction
- fastere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The MC, MR and MM treatments led to faster growth and higher tuber yield.”
t0“COCOYAM”
Claim · model-written summary
MC, MR and MM led to higher cocoyam tuber yield.
- Taxon
- COCOYAMColocasia esculentat0
- Treatment
- MC, MR and MM treatmentse0
- Outcome
- tuber yielde0
- Direction
- highere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The MC, MR and MM treatments led to faster growth and higher tuber yield.”
t0“COCOYAM”
Claim · model-written summary
Increasing poultry manure from 0 to 10.0 t ha −1 increased soil pH, OM, and soil and plant nutrients.
- Taxon
- COCOYAMColocasia esculentat0
- Treatment
- PMe0
- Outcome
- soil pH, OM, soil and plant N, P, K, Ca and Mge0
- Direction
- increasede0
- Value
- 10.0 t ha −1e0
- Comparator
- 0e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“As PM increased from 0 to 10.0 t ha −1 soil pH, OM, soil and plant N, P, K, Ca and Mg increased.”
t0“COCOYAM”
Claim · model-written summary
The 7.5 t ha −1 poultry manure treatment gave the highest leaf K, Ca and Mg.
- Taxon
- COCOYAMColocasia esculentat0
- Treatment
- 7.5 t ha −1 PMe0
- Outcome
- leaf K, Ca and Mg valuese0
- Direction
- higheste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The 7.5 t ha −1 PM gave the highest leaf K, Ca and Mg values.”
t0“COCOYAM”
Claim · model-written summary
Owo had significantly higher cocoyam yield than Obasooto.
- Taxon
- cocoyamColocasia esculentae0
- Outcome
- yielde0
- Direction
- highere0
- Comparator
- Obasooto sitee0
- Setting
- Owo sitee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Owo site had significantly higher yield and growth parameters of cocoyam compared with Obasooto site.”
Claim · model-written summary
Owo had significantly higher cocoyam growth parameters than Obasooto.
- Taxon
- cocoyamColocasia esculentae0
- Outcome
- growth parameterse0
- Direction
- highere0
- Comparator
- Obasooto sitee0
- Setting
- Owo sitee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Owo site had significantly higher yield and growth parameters of cocoyam compared with Obasooto site.”
Claim · model-written summary
Cocoyam yield and growth increased with poultry manure up to 7.5 t ha −1.
- Taxon
- cocoyamColocasia esculentae0
- Treatment
- PM level up to 7.5 t ha −1e0
- Outcome
- Yield and growth parameterse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Yield and growth parameters of cocoyam increased with increase in PM level up to 7.5 t ha −1 .”
Claim · model-written summary
MC+7.5 t ha −1 PM gave the highest cocoyam yield and growth parameters.
- Taxon
- COCOYAMColocasia esculentat0
- Treatment
- MC+7.5 t ha −1 PMe0
- Outcome
- yield and growth parameterse0
- Direction
- higheste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“MC+7.5 t ha −1 PM gave the highest values of yield and growth parameters.”
t0“COCOYAM”
The same questions in other papers
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See all 20 papers →tillage · nutrient: content · Colocasia esculenta (taro)Results agree
1 paper in the same direction as this paper
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fertilization · nutrient: content · Colocasia esculenta (taro)Results agree
5 papers in the same direction as this paper
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- positive
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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.