Abstract
This study was conducted to evaluate the influence of conservation tillage, inorganic phosphorus fertilizer and variety on soil physical properties and cowpea productivity at Minna in the Southern Guinea Savanna of Nigeria. Three tillage practices (zero, reduced and ridged), three phosphorus rates (0, 30 and 60 kg P2O5 ha-1) and three cowpea varieties (IT93K-452-1, IT99K-573-1-1 and IT90K-277-2) were factorially combined and laid out in randomized complete block design with three replications. Two crops of cowpea were cultivated sequentially. Soil and crop indices used for the evaluation were soil bulk density, soil organic carbon content, mean weight diameter, soil moisture content, haulm yield and grain yield. Conservation tillage significantly affected the four soil indices while phosphorus rates significantly affected soil organic carbon content, mean weight diameter and soil moisture content. There was a varietal effect on soil organic carbon content and soil moisture content. Conservation tillage methods influenced haulm yield significantly but had no significant effect on grain yield. Phosphorus application and variety, on the other hand, significantly affected both haulm and grain yields. Notably, in the early harvest, the application of 60 kg P2O5 ha-1 raised haulm yield from 2,489 kg ha-1 (untreated control) to 5,482 kg ha-1, and grain yield from 614 kg ha-1 (untreated control) to 1,440 kg ha-1, representing 120% and 135% increments for haulm and grain yields respectively. Farmers are advised to combine either zero or reduced tillage with 60 kg P2O5 ha-1 and IT99K-573-1-1 for maximum haulm and grain yields.
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Claims 10
Claim · model-written summary
Conservation tillage significantly affected four soil indices: bulk density, organic carbon content, mean weight diameter and soil moisture content.
- Taxon
- cowpea
Vigna unguiculatae0 - Treatment
- Conservation tillagee1
- Outcome
- four soil indicese1
- Setting
- Minna in the Southern Guinea Savanna of Nigeriae0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“This study was conducted to evaluate the influence of conservation tillage, inorganic phosphorus fertilizer and variety on soil physical properties and cowpea productivity at Minna in the Southern Guinea Savanna of Nigeria”
e1“Conservation tillage significantly affected the four soil indices”
Claim · model-written summary
Phosphorus rates significantly affected soil organic carbon content, mean weight diameter and soil moisture content.
- Taxon
- cowpeaVigna unguiculatae0
- Treatment
- phosphorus ratese2
- Outcome
- soil organic carbon content, mean weight diameter and soil moisture contente2
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“This study was conducted to evaluate the influence of conservation tillage, inorganic phosphorus fertilizer and variety on soil physical properties and cowpea productivity at Minna in the Southern Guinea Savanna of Nigeria”
e2“phosphorus rates significantly affected soil organic carbon content, mean weight diameter and soil moisture content”
Claim · model-written summary
The cowpea variety had an effect on soil organic carbon content and soil moisture content.
- Taxon
- cowpeaVigna unguiculatae0
- Treatment
- varietale3
- Outcome
- soil organic carbon content and soil moisture contente3
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“This study was conducted to evaluate the influence of conservation tillage, inorganic phosphorus fertilizer and variety on soil physical properties and cowpea productivity at Minna in the Southern Guinea Savanna of Nigeria”
e3“There was a varietal effect on soil organic carbon content and soil moisture content”
Claim · model-written summary
Conservation tillage methods significantly influenced cowpea haulm yield.
- Taxon
- cowpeaVigna unguiculatae0
- Treatment
- Conservation tillage methodse4
- Outcome
- haulm yielde4
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“This study was conducted to evaluate the influence of conservation tillage, inorganic phosphorus fertilizer and variety on soil physical properties and cowpea productivity at Minna in the Southern Guinea Savanna of Nigeria”
e4“Conservation tillage methods influenced haulm yield significantly”
Claim · model-written summary
Conservation tillage methods had no significant effect on cowpea grain yield.
- Taxon
- cowpeaVigna unguiculatae0
- Treatment
- Conservation tillage methodse4
- Outcome
- grain yielde5
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“This study was conducted to evaluate the influence of conservation tillage, inorganic phosphorus fertilizer and variety on soil physical properties and cowpea productivity at Minna in the Southern Guinea Savanna of Nigeria”
e4“Conservation tillage methods influenced haulm yield significantly”
e5“had no significant effect on grain yield”
Claim · model-written summary
Phosphorus application significantly affected cowpea haulm and grain yields.
- Taxon
- cowpeaVigna unguiculatae0
- Treatment
- Phosphorus applicatione6
- Outcome
- haulm and grain yieldse6
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“This study was conducted to evaluate the influence of conservation tillage, inorganic phosphorus fertilizer and variety on soil physical properties and cowpea productivity at Minna in the Southern Guinea Savanna of Nigeria”
e6“Phosphorus application and variety, on the other hand, significantly affected both haulm and grain yields”
Claim · model-written summary
Cowpea variety significantly affected haulm and grain yields.
- Taxon
- cowpeaVigna unguiculatae0
- Treatment
- varietye6
- Outcome
- haulm and grain yieldse6
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“This study was conducted to evaluate the influence of conservation tillage, inorganic phosphorus fertilizer and variety on soil physical properties and cowpea productivity at Minna in the Southern Guinea Savanna of Nigeria”
e6“Phosphorus application and variety, on the other hand, significantly affected both haulm and grain yields”
Claim · model-written summary
Applying 60 kg P2O5 ha-1 raised cowpea haulm yield by 120% over the untreated control.
- Taxon
- cowpeaVigna unguiculatae0
- Treatment
- 60 kg P2O5 ha-1e7
- Outcome
- haulm yielde7
- Direction
- raisede7
- Value
- 120%e1
- Qualifier
- from 2,489 kg ha-1 (untreated control) to 5,482 kg ha-1e7
- Comparator
- untreated controle7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“This study was conducted to evaluate the influence of conservation tillage, inorganic phosphorus fertilizer and variety on soil physical properties and cowpea productivity at Minna in the Southern Guinea Savanna of Nigeria”
e7“the application of 60 kg P2O5 ha-1 raised haulm yield from 2,489 kg ha-1 (untreated control) to 5,482 kg ha-1”
e1“representing 120% and 135% increments for haulm and grain yields respectively”
Claim · model-written summary
Applying 60 kg P2O5 ha-1 raised cowpea grain yield by 135% over the untreated control.
- Taxon
- cowpeaVigna unguiculatae0
- Treatment
- 60 kg P2O5 ha-1e7
- Outcome
- grain yielde1
- Direction
- raisede7
- Value
- 135%e2
- Qualifier
- from 614 kg ha-1 (untreated control) to 1,440 kg ha-1e1
- Comparator
- untreated controle1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“This study was conducted to evaluate the influence of conservation tillage, inorganic phosphorus fertilizer and variety on soil physical properties and cowpea productivity at Minna in the Southern Guinea Savanna of Nigeria”
e7“the application of 60 kg P2O5 ha-1 raised haulm yield from 2,489 kg ha-1 (untreated control) to 5,482 kg ha-1”
e1“grain yield from 614 kg ha-1 (untreated control) to 1,440 kg ha-1”
e2“representing 120% and 135% increments for haulm and grain yields respectively”
Claim · model-written summary
Zero or reduced tillage combined with 60 kg P2O5 ha-1 and IT99K-573-1-1 is advised for maximum haulm and grain yields.
- Taxon
- cowpeaVigna unguiculatae0
- Material
- IT99K-573-1-1e1
- Treatment
- zero or reduced tillage with 60 kg P2O5 ha-1e1
- Outcome
- maximum haulm and grain yieldse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“This study was conducted to evaluate the influence of conservation tillage, inorganic phosphorus fertilizer and variety on soil physical properties and cowpea productivity at Minna in the Southern Guinea Savanna of Nigeria”
e1“Farmers are advised to combine either zero or reduced tillage with 60 kg P2O5 ha-1 and IT99K-573-1-1 for maximum haulm and grain yields”
The same questions in other papers
tillage · yield · Vigna unguiculata (cowpea)Results differ
7 papers in the same direction as this paper · 27 in the opposite direction
- positive
- positive
- positive
31 papers more in this group
See all 35 papers →phosphorus · yield · Vigna unguiculata (cowpea)Results differ
106 papers in the same direction as this paper · 5 in the opposite direction · 1 reporting no difference from an alternative
- no effect
- no effect
- negative
109 papers more in this group
See all 113 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.