Abstract
Abstract Phosphorus (P) is expensive to the sub‐Saharan African resource‐poor farmers; therefore, there is a need for investigation of locally available alternative P sources to enhance farmers' productivity. Optimum P rate was determined during the early and late rains of 1999. Using the optimum P rate, influences of three P sources ogun rock phosphate (ORP), sokoto rock phosphate (SRP), single super phosphate (SSP) and a control were evaluated on amaranth varieties in 2000 at the vegetable research plots of the National Horticultural Research Institute (NIHORT), Ibadan, Nigeria. In 1999, three grain amaranth varieties (NH84/452, NH84/445, and NH84/493) were combined factorially with four P rates: 0, 30, 60, and 90 kgP/ha. Application of P significantly increased plant height, number of branches, leaf dry weight, and grain yield (GY) per plant. Significant increase in GY was in the order NH/493>NH/445>NH/452. Optimum P rates across varieties for leaf dry‐matter yield was established at 51.8 kgP/ha and for grain yield production was 48.4 kgP/ha. The experiment in the following year, 2000, was a RCB design using the optimum P determined in 1999. Three P sources (ORP, SRP, SSP) and a control were factorially combined with the three amaranth varieties. In the 2000 experiment, grain yield was 21.3, 16.9, 16.0, and 7.8 g/plant, respectively, for SSP, SRP, ORP, and the control. Growth was ranked in the order SSP>ORP>SRP>control. It was concluded for fertilizer recommendation purposes that 50 kgP/ha is optimum for grain amaranth production and that amaranth productivity indices could be alternatively improved with indigenous P sources.
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Claims 12
Claim · model-written summary
Application of P significantly increased plant height, number of branches and leaf dry weight of grain amaranth relative to 0 kgP/ha.
- Taxon
- Grain Amaranth
Amaranthus hypochondriacust0 - Treatment
- Application of Pe1
- Outcome
- plant height, number of branches, leaf dry weighte1
- Direction
- significantly increasede1
- Comparator
- 0e2
- Setting
- Ibadan, Nigeriae3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Grain Amaranth Production”
e1“Application of P significantly increased plant height, number of branches, leaf dry weight, and grain yield (GY) per plant”
e2“four P rates: 0, 30, 60, and 90 kgP/ha”
e3“at the vegetable research plots of the National Horticultural Research Institute (NIHORT), Ibadan, Nigeria”
Claim · model-written summary
Application of P significantly increased grain yield per plant of grain amaranth relative to 0 kgP/ha.
- Taxon
- Grain AmaranthAmaranthus hypochondriacust0
- Treatment
- Application of Pe1
- Outcome
- grain yield (GY) per plante1
- Direction
- significantly increasede1
- Comparator
- 0e2
- Setting
- Ibadan, Nigeriae3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Grain Amaranth Production”
e1“Application of P significantly increased plant height, number of branches, leaf dry weight, and grain yield (GY) per plant”
e2“four P rates: 0, 30, 60, and 90 kgP/ha”
e3“at the vegetable research plots of the National Horticultural Research Institute (NIHORT), Ibadan, Nigeria”
Claim · model-written summary
Grain yield of the three grain amaranth varieties increased significantly in the order NH/493 > NH/445 > NH/452.
- Taxon
- Grain AmaranthAmaranthus hypochondriacust0
- Material
- NH/493>NH/445>NH/452e4
- Outcome
- GYe4
- Direction
- Significant increasee4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Grain Amaranth Production”
e4“Significant increase in GY was in the order NH/493>NH/445>NH/452”
Claim · model-written summary
The optimum P rate across varieties for leaf dry-matter yield was 51.8 kgP/ha.
- Taxon
- Grain AmaranthAmaranthus hypochondriacust0
- Outcome
- optimum P ratee5
- Value
- 51.8 kgP/hae6
- Qualifier
- across varietiese5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Grain Amaranth Production”
e5“Optimum P rates across varieties”
e6“was established at 51.8 kgP/ha”
Claim · model-written summary
The optimum P rate for grain yield production was 48.4 kgP/ha.
- Taxon
- Grain AmaranthAmaranthus hypochondriacust0
- Outcome
- grain yield productione7
- Value
- 48.4 kgP/hae7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Grain Amaranth Production”
e7“for grain yield production was 48.4 kgP/ha”
Claim · model-written summary
SSP increased grain yield of grain amaranth compared with the control; SSP grain yield was 21.3 g/plant.
- Taxon
- Grain AmaranthAmaranthus hypochondriacust0
- Treatment
- SSPe5
- Outcome
- grain yielde5
- Direction
- higherinferrede5
- Value
- 21.3e5
- Comparator
- the controle5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Grain Amaranth Production”
e5“grain yield was 21.3, 16.9, 16.0, and 7.8 g/plant, respectively, for SSP, SRP, ORP, and the control”
Claim · model-written summary
SRP increased grain yield of grain amaranth compared with the control; SRP grain yield was 16.9 g/plant.
- Taxon
- Grain AmaranthAmaranthus hypochondriacust0
- Treatment
- SRPe5
- Outcome
- grain yielde5
- Direction
- higherinferrede5
- Value
- 16.9e5
- Comparator
- the controle5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Grain Amaranth Production”
e5“grain yield was 21.3, 16.9, 16.0, and 7.8 g/plant, respectively, for SSP, SRP, ORP, and the control”
Claim · model-written summary
ORP increased grain yield of grain amaranth compared with the control; ORP grain yield was 16.0 g/plant.
- Taxon
- Grain AmaranthAmaranthus hypochondriacust0
- Treatment
- ORPe5
- Outcome
- grain yielde5
- Direction
- higherinferrede5
- Value
- 16.0e5
- Comparator
- the controle5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Grain Amaranth Production”
e5“grain yield was 21.3, 16.9, 16.0, and 7.8 g/plant, respectively, for SSP, SRP, ORP, and the control”
Claim · model-written summary
Grain yield of grain amaranth in the control without P source was 7.8 g/plant.
- Taxon
- Grain AmaranthAmaranthus hypochondriacust0
- Outcome
- grain yielde5
- Value
- 7.8e5
- Qualifier
- the controle5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Grain Amaranth Production”
e5“grain yield was 21.3, 16.9, 16.0, and 7.8 g/plant, respectively, for SSP, SRP, ORP, and the control”
Claim · model-written summary
Growth of grain amaranth was ranked SSP > ORP > SRP > control.
- Taxon
- Grain AmaranthAmaranthus hypochondriacust0
- Treatment
- SSPe6
- Outcome
- Growthe6
- Direction
- ranked in the order SSP>ORP>SRP>controle6
- Comparator
- controle6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Grain Amaranth Production”
e6“Growth was ranked in the order SSP>ORP>SRP>control”
Claim · model-written summary
For fertilizer recommendation, 50 kgP/ha is the optimum for grain amaranth production.
- Taxon
- Grain AmaranthAmaranthus hypochondriacust0
- Outcome
- optimum for grain amaranth productione7
- Value
- 50 kgP/hae7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Grain Amaranth Production”
e7“It was concluded for fertilizer recommendation purposes that 50 kgP/ha is optimum for grain amaranth production”
Claim · model-written summary
Amaranth productivity indices could alternatively be improved with indigenous P sources.
- Taxon
- Grain AmaranthAmaranthus hypochondriacust0
- Treatment
- indigenous P sourcese0
- Outcome
- amaranth productivity indicese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Grain Amaranth Production”
e0“amaranth productivity indices could be alternatively improved with indigenous P sources”
The same questions in other papers
phosphorus · yield · Amaranthus hypochondriacus (grain amaranth)Results agree
1 paper in the same direction as this paper
- positive
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.