Abstract
To investigate the effect of nitrogen fertilizer and planting density on yield and yield components of potato crop (Bubu variety), a field experiment was carried out in Haramaya, Eastern Ethiopia during the rainy season of 2012. The experiment was a 4 x 5 factorial combination and a randomized complete block design with 3 replicates. Treatments included quantity of nitrogen fertilizer (0, 110, 165 and 220 kg N/ha) and planting density (4.17 plant m-2 (80 cm x 30 cm), 4.44 plant m-2 (75 cm x 30 cm), 5.56 plant m-2 (60 cm x 30 cm), 6.67 plant m-2 (60 cm x 25 cm) and 8 plant m-2 (50 cm x 25 cm)). Increasing nitrogen level up to110 kg N/ha lead to more tuber yield, highest stem number, plant height, total dry biomass, total tuber number, large-sized tuber yield (59.01%) and marketable tuber yield. The highest foliar N concentration was recorded at 165 kg N/ha. Increasing planting density resulted in higher tuber yield; total tuber number, total dry biomass yield (%), marketable tuber yield and small-sized tuber yield (16.92%). Highest foliar N concentration was found at the lower planting densities of 4.17 and 4.44 plant m-2. Yield of tuber per hectare was significantly and positively correlated with leaf area index, total tuber number, days to physiological maturity and total dry biomass yield. In conclusion, results of the experiment revealed that 110 kg N/ha and planting density of 6.67 plant m-2 resulted in optimum total (35.50 and 35.66 t/ha, respectively) and marketable tuber yields of the Bubu variety in Haramaya, Eastern Ethiopia during the rainy season.
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Claims 20
Claim · model-written summary
Nitrogen up to 110 kg N/ha improved tuber yield.
- Taxon
- Potato
Solanum tuberosumt0 - Treatment
- nitrogen level up to110 kg N/hae0
- Outcome
- tuber yielde0
- Direction
- moree0
Not reportedComparatorValue
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Increasing nitrogen level up to110 kg N/ha lead to more tuber yield, highest stem number, plant height, total dry biomass, total tuber number, large-sized tuber yield (59.01%) and marketable tuber yield.”
t0“Potato ( Solanum tuberosum L.)”
Claim · model-written summary
Nitrogen up to 110 kg N/ha improved stem number.
- Taxon
- PotatoSolanum tuberosumt0
- Treatment
- nitrogen level up to110 kg N/hae0
- Outcome
- stem numbere0
- Direction
- higheste0
Not reportedComparatorValue
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Increasing nitrogen level up to110 kg N/ha lead to more tuber yield, highest stem number, plant height, total dry biomass, total tuber number, large-sized tuber yield (59.01%) and marketable tuber yield.”
t0“Potato ( Solanum tuberosum L.)”
Claim · model-written summary
Nitrogen up to 110 kg N/ha improved plant height.
- Taxon
- PotatoSolanum tuberosumt0
- Treatment
- nitrogen level up to110 kg N/hae0
- Outcome
- plant heighte0
- Direction
- higheste0
Not reportedComparatorValue
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Increasing nitrogen level up to110 kg N/ha lead to more tuber yield, highest stem number, plant height, total dry biomass, total tuber number, large-sized tuber yield (59.01%) and marketable tuber yield.”
t0“Potato ( Solanum tuberosum L.)”
Claim · model-written summary
Nitrogen up to 110 kg N/ha improved total dry biomass.
- Taxon
- PotatoSolanum tuberosumt0
- Treatment
- nitrogen level up to110 kg N/hae0
- Outcome
- total dry biomasse0
- Direction
- moree0
Not reportedComparatorValue
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Increasing nitrogen level up to110 kg N/ha lead to more tuber yield, highest stem number, plant height, total dry biomass, total tuber number, large-sized tuber yield (59.01%) and marketable tuber yield.”
t0“Potato ( Solanum tuberosum L.)”
Claim · model-written summary
Nitrogen up to 110 kg N/ha improved total tuber number.
- Taxon
- PotatoSolanum tuberosumt0
- Treatment
- nitrogen level up to110 kg N/hae0
- Outcome
- total tuber numbere0
- Direction
- moree0
Not reportedComparatorValue
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Increasing nitrogen level up to110 kg N/ha lead to more tuber yield, highest stem number, plant height, total dry biomass, total tuber number, large-sized tuber yield (59.01%) and marketable tuber yield.”
t0“Potato ( Solanum tuberosum L.)”
Claim · model-written summary
Nitrogen up to 110 kg N/ha improved large-sized tuber yield.
- Taxon
- PotatoSolanum tuberosumt0
- Treatment
- nitrogen level up to110 kg N/hae0
- Outcome
- large-sized tuber yielde0
- Direction
- moree0
- Value
- 59.01%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Increasing nitrogen level up to110 kg N/ha lead to more tuber yield, highest stem number, plant height, total dry biomass, total tuber number, large-sized tuber yield (59.01%) and marketable tuber yield.”
t0“Potato ( Solanum tuberosum L.)”
Claim · model-written summary
Nitrogen up to 110 kg N/ha improved marketable tuber yield.
- Taxon
- PotatoSolanum tuberosumt0
- Treatment
- nitrogen level up to110 kg N/hae0
- Outcome
- marketable tuber yielde0
- Direction
- moree0
Not reportedComparatorValue
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Increasing nitrogen level up to110 kg N/ha lead to more tuber yield, highest stem number, plant height, total dry biomass, total tuber number, large-sized tuber yield (59.01%) and marketable tuber yield.”
t0“Potato ( Solanum tuberosum L.)”
Claim · model-written summary
Foliar nitrogen concentration was highest at 165 kg N/ha.
- Taxon
- PotatoSolanum tuberosumt0
- Treatment
- 165 kg N/hae0
- Outcome
- foliar N concentratione0
- Direction
- higheste0
Not reportedComparatorValue
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The highest foliar N concentration was recorded at 165 kg N/ha.”
t0“Potato ( Solanum tuberosum L.)”
Claim · model-written summary
Increasing planting density raised tuber yield.
- Taxon
- PotatoSolanum tuberosumt0
- Treatment
- Increasing planting densitye0
- Outcome
- tuber yielde0
- Direction
- highere0
Not reportedComparatorValue
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Increasing planting density resulted in higher tuber yield; total tuber number, total dry biomass yield (%), marketable tuber yield and small-sized tuber yield (16.92%).”
t0“Potato ( Solanum tuberosum L.)”
Claim · model-written summary
Increasing planting density raised total tuber number.
- Taxon
- PotatoSolanum tuberosumt0
- Treatment
- Increasing planting densitye0
- Outcome
- total tuber numbere0
- Direction
- highere0
Not reportedComparatorValue
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Increasing planting density resulted in higher tuber yield; total tuber number, total dry biomass yield (%), marketable tuber yield and small-sized tuber yield (16.92%).”
t0“Potato ( Solanum tuberosum L.)”
Claim · model-written summary
Increasing planting density raised total dry biomass yield.
- Taxon
- PotatoSolanum tuberosumt0
- Treatment
- Increasing planting densitye0
- Outcome
- total dry biomass yielde0
- Direction
- highere0
Not reportedComparatorValue
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Increasing planting density resulted in higher tuber yield; total tuber number, total dry biomass yield (%), marketable tuber yield and small-sized tuber yield (16.92%).”
t0“Potato ( Solanum tuberosum L.)”
Claim · model-written summary
Increasing planting density raised marketable tuber yield.
- Taxon
- PotatoSolanum tuberosumt0
- Treatment
- Increasing planting densitye0
- Outcome
- marketable tuber yielde0
- Direction
- highere0
Not reportedComparatorValue
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Increasing planting density resulted in higher tuber yield; total tuber number, total dry biomass yield (%), marketable tuber yield and small-sized tuber yield (16.92%).”
t0“Potato ( Solanum tuberosum L.)”
Claim · model-written summary
Increasing planting density raised small-sized tuber yield.
- Taxon
- PotatoSolanum tuberosumt0
- Treatment
- Increasing planting densitye0
- Outcome
- small-sized tuber yielde0
- Direction
- highere0
- Value
- 16.92%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Increasing planting density resulted in higher tuber yield; total tuber number, total dry biomass yield (%), marketable tuber yield and small-sized tuber yield (16.92%).”
t0“Potato ( Solanum tuberosum L.)”
Claim · model-written summary
Foliar nitrogen was highest at the two lowest planting densities.
- Taxon
- PotatoSolanum tuberosumt0
- Treatment
- lower planting densities of 4.17 and 4.44 plant m-2e0
- Outcome
- foliar N concentratione0
- Direction
- Higheste0
Not reportedComparatorValue
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Highest foliar N concentration was found at the lower planting densities of 4.17 and 4.44 plant m-2.”
t0“Potato ( Solanum tuberosum L.)”
Claim · model-written summary
Tuber yield per hectare was positively correlated with leaf area index.
- Taxon
- PotatoSolanum tuberosumt0
- Organ / stage
- leaf area indexe0
- Outcome
- Yield of tuber per hectaree0
- Direction
- positivelye0
Not reportedTreatmentComparatorValue
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Yield of tuber per hectare was significantly and positively correlated with leaf area index, total tuber number, days to physiological maturity and total dry biomass yield.”
t0“Potato ( Solanum tuberosum L.)”
Claim · model-written summary
Tuber yield per hectare was positively correlated with total tuber number.
- Taxon
- PotatoSolanum tuberosumt0
- Organ / stage
- total tuber numbere0
- Outcome
- Yield of tuber per hectaree0
- Direction
- positivelye0
Not reportedTreatmentComparatorValue
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Yield of tuber per hectare was significantly and positively correlated with leaf area index, total tuber number, days to physiological maturity and total dry biomass yield.”
t0“Potato ( Solanum tuberosum L.)”
Claim · model-written summary
Tuber yield per hectare was positively correlated with days to physiological maturity.
- Taxon
- PotatoSolanum tuberosumt0
- Organ / stage
- days to physiological maturitye0
- Outcome
- Yield of tuber per hectaree0
- Direction
- positivelye0
Not reportedTreatmentComparatorValue
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Yield of tuber per hectare was significantly and positively correlated with leaf area index, total tuber number, days to physiological maturity and total dry biomass yield.”
t0“Potato ( Solanum tuberosum L.)”
Claim · model-written summary
Tuber yield per hectare was positively correlated with total dry biomass yield.
- Taxon
- PotatoSolanum tuberosumt0
- Organ / stage
- total dry biomass yielde0
- Outcome
- Yield of tuber per hectaree0
- Direction
- positivelye0
Not reportedTreatmentComparatorValue
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Yield of tuber per hectare was significantly and positively correlated with leaf area index, total tuber number, days to physiological maturity and total dry biomass yield.”
t0“Potato ( Solanum tuberosum L.)”
Claim · model-written summary
Nitrogen at 110 kg N/ha gave optimum total tuber yield of 35.50 t/ha.
- Taxon
- PotatoSolanum tuberosumt0
- Treatment
- 110 kg N/hae0
- Outcome
- totale0
- Direction
- optimume0
- Value
- 35.50 and 35.66 t/hae0
- Setting
- Haramaya, Eastern Ethiopiae0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“110 kg N/ha and planting density of 6.67 plant m-2 resulted in optimum total (35.50 and 35.66 t/ha, respectively) and marketable tuber yields of the Bubu variety in Haramaya, Eastern Ethiopia during the rainy season.”
t0“Potato ( Solanum tuberosum L.)”
Claim · model-written summary
Planting density of 6.67 plant m-2 gave optimum total tuber yield of 35.66 t/ha.
- Taxon
- PotatoSolanum tuberosumt0
- Treatment
- planting density of 6.67 plant m-2e0
- Outcome
- totale0
- Direction
- optimume0
- Value
- 35.50 and 35.66 t/hae0
- Setting
- Haramaya, Eastern Ethiopiae0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“110 kg N/ha and planting density of 6.67 plant m-2 resulted in optimum total (35.50 and 35.66 t/ha, respectively) and marketable tuber yields of the Bubu variety in Haramaya, Eastern Ethiopia during the rainy season.”
t0“Potato ( Solanum tuberosum L.)”
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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.