Abstract
Abstract Low soil fertility is one of the critical factors limiting the productivity of potatoes ( Solanum tuberosum L.) in western Ethiopia. The field experiment was conducted in the 2015 and 2016 cropping seasons to elucidate the response of potato yield, yield components, tuber quality to nitrogen and phosphorus fertilizer, and their economic benefit. The treatment comprised five levels of nitrogen (0, 50, 100, 150, and 200 kg N ha −1 ) and five levels of phosphorus (0, 50, 100, 150, and 200 kg P 2 O 5 ha −1 ). The experiment was laid out as a randomized complete block design in a factorial (5 × 5) arrangement and we replicated the treatments three times. The results revealed that the interaction of nitrogen and phosphorus did not affect growth, yield, and quality parameters of potato. However, nitrogen alone affected plant height, tuber number per plant, number of stems per hill, and marketable and total tuber yield, but not tuber quality parameters. The optimum yields of both marketable (25.5 Mg ha −1 ) and total (28.4 Mg ha −1 ) tuber yields were observed in the application of 150 kg N ha −1 . Phosphorus treatments had no response for most of the yield, yield components, or tuber quality parameters. Applications of 150 kg N ha −1 provided a maximum gross margin ($5138.68 or 141,773.55 Ethiopian Birr [ETB] ha −1 ) with a 79.4% gross profit margin and the highest benefit‐cost ratio (4.86).
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Claims 9
Claim · model-written summary
Nitrogen and phosphorus interaction did not affect potato growth, yield or quality.
- Taxon
- potato
Solanum tuberosume0 - Treatment
- interaction of nitrogen and phosphoruse0
- Outcome
- growth, yield, and quality parameterse0
- Direction
- did not affecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the interaction of nitrogen and phosphorus did not affect growth, yield, and quality parameters of potato”
Claim · model-written summary
Nitrogen affected potato plant height, tuber number, stems per hill, and marketable and total yield.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- nitrogene0
- Outcome
- plant height, tuber number per plant, number of stems per hill, and marketable and total tuber yielde0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“nitrogen alone affected plant height, tuber number per plant, number of stems per hill, and marketable and total tuber yield”
t0“potato”
Claim · model-written summary
Nitrogen did not affect tuber quality.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- nitrogene0
- Outcome
- tuber quality parameterse0
- Direction
- note0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“nitrogen alone affected plant height, tuber number per plant, number of stems per hill, and marketable and total tuber yield, but not tuber quality parameters”
t0“potato”
Claim · model-written summary
At 150 kg N ha −1, marketable tuber yield reached 25.5 Mg ha −1.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- 150 kg N ha −1e0
- Outcome
- marketablee0
- Direction
- optimume0
- Value
- 25.5 Mg ha −1e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“optimum yields of both marketable (25.5 Mg ha −1 ) and total (28.4 Mg ha −1 ) tuber yields were observed in the application of 150 kg N ha −1”
t0“potato”
Claim · model-written summary
At 150 kg N ha −1, total tuber yield reached 28.4 Mg ha −1.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- 150 kg N ha −1e0
- Outcome
- totale0
- Direction
- optimume0
- Value
- 28.4 Mg ha −1e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“optimum yields of both marketable (25.5 Mg ha −1 ) and total (28.4 Mg ha −1 ) tuber yields were observed in the application of 150 kg N ha −1”
t0“potato”
Claim · model-written summary
Phosphorus generally produced no response in yield, yield components, or tuber quality.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- Phosphorus treatmentse0
- Outcome
- yield, yield components, or tuber quality parameterse0
- Direction
- no responsee0
- Qualifier
- moste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Phosphorus treatments had no response for most of the yield, yield components, or tuber quality parameters”
t0“potato”
Claim · model-written summary
The 150 kg N ha −1 rate gave the maximum gross margin of $5138.68 or 141,773.55 ETB ha −1.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- 150 kg N ha −1e0
- Outcome
- gross margine0
- Direction
- maximume0
- Value
- $5138.68 or 141,773.55 Ethiopian Birr [ETB] ha −1e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Applications of 150 kg N ha −1 provided a maximum gross margin ($5138.68 or 141,773.55 Ethiopian Birr [ETB] ha −1 )”
t0“potato”
Claim · model-written summary
The 150 kg N ha −1 rate gave a 79.4% gross profit margin.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- 150 kg N ha −1e0
- Outcome
- gross profit margine0
- Value
- 79.4%e0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Applications of 150 kg N ha −1 provided a maximum gross margin ($5138.68 or 141,773.55 Ethiopian Birr [ETB] ha −1 ) with a 79.4% gross profit margin and the highest benefit‐cost ratio (4.86)”
t0“potato”
Claim · model-written summary
The 150 kg N ha −1 rate gave the highest benefit cost ratio, 4.86.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- 150 kg N ha −1e0
- Outcome
- benefit‐cost ratioe0
- Direction
- higheste0
- Value
- 4.86e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Applications of 150 kg N ha −1 provided a maximum gross margin ($5138.68 or 141,773.55 Ethiopian Birr [ETB] ha −1 ) with a 79.4% gross profit margin and the highest benefit‐cost ratio (4.86)”
t0“potato”
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See all 28 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.