Abstract
As a controlled release N source, PSCU has the potential to increase total and marketable tuber yields with a single pre-plant application compared to urea source. However, there are still risks of leaching urea-N from a PSCU after the first few leaching events in sandy soils. Heavy early-season rainfall can deplete available soil N; thereby side-dress fertilizers might be still required to produce optimum tuber yields for both PSCU and urea treatments. Besides leaching, urea and urea-based controlled-release fertilizers can also result in volatilization and denitrification, resulting in lower N uptake as well as lower yields. Increase of N rate from 168 to 224 kg/ha barely benefits tuber yields, but increases the potential for leaching losses. Intermittent seepage irrigation can reduce water use and maintain or even increase tuber yield compared to the TSI if appropriate irrigation schedule is used. Nitrate leaching can also be minimized by supplying irrigation instead of over-nights over-days under ISI.
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Claims 9
Claim · model-written summary
PSCU has potential to increase total and marketable tuber yields compared with urea.
- Taxon
- potato
Solanum tuberosumt0 - Treatment
- PSCUe0
- Outcome
- total and marketable tuber yieldse0
- Direction
- increasee0
- Comparator
- urea sourcee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“potato”
e0“PSCU has the potential to increase total and marketable tuber yields with a single pre-plant application compared to urea source”
Claim · model-written summary
PSCU may leach urea-N after early leaching events in sandy soils.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- PSCUe0
- Outcome
- leaching urea-Ne0
- Setting
- sandy soilse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“potato”
e0“risks of leaching urea-N from a PSCU after the first few leaching events in sandy soils”
Claim · model-written summary
Heavy early-season rainfall can deplete available soil nitrogen.
- Taxon
- potatoSolanum tuberosumt0
- Outcome
- available soil Ne0
- Direction
- depletee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“potato”
e0“Heavy early-season rainfall can deplete available soil N”
Claim · model-written summary
Side-dress fertilizer may be needed for optimum tuber yields with both nitrogen sources.
- Taxon
- potatoSolanum tuberosumt0
- Outcome
- side-dress fertilizers might be still requirede0
- Qualifier
- both PSCU and urea treatmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“potato”
e0“side-dress fertilizers might be still required to produce optimum tuber yields for both PSCU and urea treatments”
Claim · model-written summary
Volatilization and denitrification from urea fertilizers can reduce nitrogen uptake and yields.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- urea and urea-based controlled-release fertilizerse0
- Outcome
- lower N uptake as well as lower yieldse0
- Qualifier
- volatilization and denitrificatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“potato”
e0“urea and urea-based controlled-release fertilizers can also result in volatilization and denitrification, resulting in lower N uptake as well as lower yields”
Claim · model-written summary
Increasing N from 168 to 224 kg/ha barely benefited tuber yield.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- N rate from 168 to 224 kg/hae0
- Outcome
- tuber yieldse0
- Direction
- barely benefitse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“potato”
e0“Increase of N rate from 168 to 224 kg/ha barely benefits tuber yields”
Claim · model-written summary
Increasing N from 168 to 224 kg/ha increased leaching potential.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- N rate from 168 to 224 kg/hae0
- Outcome
- potential for leaching lossese0
- Direction
- increasese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“potato”
e0“Increase of N rate from 168 to 224 kg/ha barely benefits tuber yields, but increases the potential for leaching losses”
Claim · model-written summary
Intermittent seepage irrigation can reduce water use compared with TSI.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- Intermittent seepage irrigatione0
- Outcome
- water usee0
- Direction
- reducee0
- Comparator
- TSIe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“potato”
e0“Intermittent seepage irrigation can reduce water use and maintain or even increase tuber yield compared to the TSI”
Claim · model-written summary
Intermittent seepage irrigation can maintain or increase tuber yield compared with TSI under suitable scheduling.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- Intermittent seepage irrigatione0
- Outcome
- tuber yielde0
- Direction
- maintain or even increasee0
- Qualifier
- if appropriate irrigation schedule is usede0
- Comparator
- TSIe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“potato”
e0“Intermittent seepage irrigation can reduce water use and maintain or even increase tuber yield compared to the TSI if appropriate irrigation schedule is used”
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