Abstract
There has been increasing interest in the quality of food produced in the sub-Saharan Africa and organic fertilizers can be used as palliative for eradicating malnutrition and improving the livelihood of the populace. A study was conducted in two phases, 4 × 5 × 2 and 2 × 4 factorial experiments in a completely randomized design with three replicates at the Department of Agronomy screenhouse, University of Ibadan, Nigeria. In the first experiment, five N levels (0, 20, 40, 60 and 80 kgN/ha) were combined with two P levels (0 and 20 kgP/ha) using urea and single superphosphate, respectively and four varieties (Roma VF, UC82B, Rio grande and Roma savana) of tomatoes were used. In the second experiment, optimum rates (60 kgN and 20 kgP/ha) from the first experiment formed the basis for the application of urea + SSP, urine + ORP, urea + SSP + urine + ORP and control. The best-performing varieties (Rio grande and Roma savana) in the first experiment were used. Data were subjected to analysis of variance. Combined application of N and P had higher N use efficiency and nutrient uptake than sole application of N or P. Urine + ORP based fertilizer mixtures were best for nutrient uptake and crop utilization of N and P. Increasing N levels led to decrease in nutrient use efficiency. Application of urine + ORP and urea + SSP gave better fruit qualities. The descending order of varietal superiority with respect to nutrient uptake, utilization and quality was: Rio grande > Roma savana > Roma VF > UC82B. Thus, urine + ORP based fertilizer mixtures have great potentials as substitutes for urea + SSP in the production of tomatoes.
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Claims 7
Claim · model-written summary
Combined N and P increased N use efficiency and nutrient uptake over sole nutrient application.
- Taxon
- tomatoes
Solanum lycopersicume1 - Treatment
- Combined application of N and Pe0
- Outcome
- N use efficiency and nutrient uptakee0
- Direction
- highere0
- Comparator
- sole application of N or Pe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Combined application of N and P had higher N use efficiency and nutrient uptake than sole application of N or P.”
e1“Thus, urine + ORP based fertilizer mixtures have great potentials as substitutes for urea + SSP in the production of tomatoes.”
Claim · model-written summary
Urine and ORP mixtures performed best for nutrient uptake and N and P use.
- Taxon
- tomatoesSolanum lycopersicume1
- Outcome
- nutrient uptake and crop utilization of N and Pe0
- Direction
- beste0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Urine + ORP based fertilizer mixtures were best for nutrient uptake and crop utilization of N and P.”
e1“Thus, urine + ORP based fertilizer mixtures have great potentials as substitutes for urea + SSP in the production of tomatoes.”
Claim · model-written summary
Increasing N reduced nutrient use efficiency.
- Taxon
- tomatoesSolanum lycopersicume1
- Treatment
- Increasing N levelse0
- Outcome
- nutrient use efficiencye0
- Direction
- decreasee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Increasing N levels led to decrease in nutrient use efficiency.”
e1“Thus, urine + ORP based fertilizer mixtures have great potentials as substitutes for urea + SSP in the production of tomatoes.”
Claim · model-written summary
Urine plus ORP improved fruit quality.
- Taxon
- tomatoesSolanum lycopersicume1
- Outcome
- fruit qualitiese0
- Direction
- bettere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Application of urine + ORP and urea + SSP gave better fruit qualities.”
e1“Thus, urine + ORP based fertilizer mixtures have great potentials as substitutes for urea + SSP in the production of tomatoes.”
Claim · model-written summary
Urea plus SSP improved fruit quality.
- Taxon
- tomatoesSolanum lycopersicume1
- Outcome
- fruit qualitiese0
- Direction
- bettere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Application of urine + ORP and urea + SSP gave better fruit qualities.”
e1“Thus, urine + ORP based fertilizer mixtures have great potentials as substitutes for urea + SSP in the production of tomatoes.”
Claim · model-written summary
Rio grande ranked above Roma savana, Roma VF and UC82B for nutrient uptake, utilization and quality.
- Taxon
- tomatoesSolanum lycopersicume1
- Material
- Rio grandee0
- Outcome
- nutrient uptake, utilization and qualitye0
- Direction
- descending ordere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The descending order of varietal superiority with respect to nutrient uptake, utilization and quality was: Rio grande > Roma savana > Roma VF > UC82B.”
e1“Thus, urine + ORP based fertilizer mixtures have great potentials as substitutes for urea + SSP in the production of tomatoes.”
Claim · model-written summary
Urine and ORP mixtures have potential to substitute for urea and SSP in tomato production.
- Taxon
- tomatoesSolanum lycopersicume0
- Outcome
- substitutes for urea + SSPe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Thus, urine + ORP based fertilizer mixtures have great potentials as substitutes for urea + SSP in the production of tomatoes.”
The same questions in other papers
nitrogen · nutrient: efficiency · Solanum lycopersicum (tomato)Positive and negative results
9 papers in the same direction as this paper · 5 in the opposite direction
- negative
- negative
- negative
11 papers more in this group
See all 15 papers →phosphorus · nutrient: efficiency · Solanum lycopersicum (tomato)Results agree
2 papers in the same direction as this paper
- positive
- 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.