Abstract
Abstract With a view to develop simpler techniques for improving the efficiency of nitrogen fertilizer use for lowland rice, field studies were conducted in 1986 and 1987. During 1986, dry soil incorporation of urea was compared with puddled soil application of urea and calcium ammonium nitrate (CAN) and deep placement of urea super granule (USG). In 1987, the application of urea in puddled soil without standing water (soil saturation) was compared with the application in standing water and deep placement of USG. The results revealed that deep placement of USG and dry soil incorporation of urea were comparable in their effect on the increase of the number of productive tillers, straw and paddy yield, and agronomic efficiency. Consequently N utilization and recovery efficiency were higher with these methods of fertilizer application than with the application of urea and CAN in puddled soil. Application of urea fertilizer under soil saturation conditions and deep placement of USG were found to be comparable in the production of tillers, straw and grain yield and both gave similar agronomic and N recovery efficiencies to the application of urea on the Miranpur soil under standing water conditions.
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Claims 4
Claim · model-written summary
Deep placement of USG and dry incorporation of urea had comparable effects on tillers, straw and paddy yield, and agronomic efficiency.
- Taxon
- lowland ricet0
- Treatment
- deep placement of USG and dry soil incorporation of ureae0
- Outcome
- number of productive tillers, straw and paddy yield, and agronomic efficiencye0
- Direction
- comparablee0
Not reportedComparator
Verbatim
e0“deep placement of USG and dry soil incorporation of urea were comparable in their effect on the increase of the number of productive tillers, straw and paddy yield, and agronomic efficiency”
t0“lowland rice”
Claim · model-written summary
Those placement methods increased nitrogen utilization and recovery efficiency over puddled-soil application.
Verbatim
e0“N utilization and recovery efficiency were higher with these methods of fertilizer application than with the application of urea and CAN in puddled soil”
t0“lowland rice”
Claim · model-written summary
Urea under soil saturation and deep USG placement gave comparable tillers, straw and grain yield.
- Taxon
- lowland ricet0
- Treatment
- Application of urea fertilizer under soil saturation conditions and deep placement of USGe0
- Outcome
- production of tillers, straw and grain yielde0
- Direction
- comparablee0
Not reportedComparator
Verbatim
e0“Application of urea fertilizer under soil saturation conditions and deep placement of USG were found to be comparable in the production of tillers, straw and grain yield”
t0“lowland rice”
Claim · model-written summary
These treatments gave agronomic and N recovery efficiencies similar to urea application under standing water.
Verbatim
e0“both gave similar agronomic and N recovery efficiencies to the application of urea on the Miranpur soil under standing water conditions”
t0“lowland rice”
The same questions in other papers
nitrogen · yield · Oryza sativa (rice)Positive and negative results
1,802 papers in the same direction as this paper · 193 in the opposite direction · 49 reporting no difference from an alternative
- negative
- no effect
- positive
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