Paper · 2025 · Plant Science Today

Impact of neem-coated urea and nano urea on rice under Tamirabarani river basin

E Dheenadhayalan; S Jothimani; K Baskar; et al.

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citations
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Open access · cc-by

Abstract

This study examined to evaluate the nitrogen use efficiency (NUE) of neem-coated urea (NCU), nano urea (NU) and productivity of two widely grown rice varieties, ASD16 and ADT46 around Tamirabarani River basin. Treatments included varying foliar dosages of NCU, NU, the recommended dose of fertilizers (RDF) and control. Results showed RDF significantly outperformed all treatments in quantitative parameters (plant height, tiller density, grain yield, straw yield) and qualitative parameters (chlorophyll content, leaf area index), followed by NCU, NU and the control. The balanced nutrient profile of RDF and soil-based application maximized uptake and plant growth, unlike the nitrogen-limited and foliar-dependent NCU and NU. Notably, NCU’s higher nitrogen content (46 %) and slow-release properties via neem coating enhanced absorption compared to NU’s lower nitrogen (4 %) and reliance on foliar uptake, which likely faced inefficiencies due to leaf surface limitations and environmental factors like humidity. These findings position RDF as the most effective option for optimizing rice productivity in this region, highlighting the critical role of comprehensive nutrient delivery and efficient absorption mechanisms.

Abstract from the paper’s OpenAlex record; open copy licensed cc-by. Read at the source ↗

The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.

Claims 5

Intervention effectobservedoriginal resultpositivesignificant (as stated)measured

Claim · model-written summary

Recommended fertilizer significantly outperformed other treatments for plant height, tiller density and grain yield.

Treatment
RDFe0
Outcome
plant height, tiller density, grain yielde0
Direction
outperformede0
Comparator
all treatmentse0

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Oryza sativa
Oryza sativa · Taxon · picture from its Wikimedia Commons categoryDesmanthus4food · CC BY-SA 3.0 us · Wikimedia Commons ↗

Verbatim

e0

“RDF significantly outperformed all treatments in quantitative parameters (plant height, tiller density, grain yield, straw yield)”

✓ located verbatim in the source · abstract, characters 335–464 · show in text ↑
t0

“rice”

✓ located verbatim in the source · title, characters 44–48 · show in text ↑
Intervention effectobservedoriginal resultpositivesignificant (as stated)measured

Claim · model-written summary

Recommended fertilizer significantly outperformed other treatments for straw yield.

Treatment
RDFe0
Outcome
straw yielde0
Direction
outperformede0
Comparator
all treatmentse0

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Oryza sativa
Oryza sativa · Taxon · picture from its Wikimedia Commons categoryDesmanthus4food · CC BY-SA 3.0 us · Wikimedia Commons ↗

Verbatim

e0

“RDF significantly outperformed all treatments in quantitative parameters (plant height, tiller density, grain yield, straw yield)”

✓ located verbatim in the source · abstract, characters 335–464 · show in text ↑
t0

“rice”

✓ located verbatim in the source · title, characters 44–48 · show in text ↑
Intervention effectobservedoriginal resultpositivesignificant (as stated)measured

Claim · model-written summary

Recommended fertilizer significantly outperformed other treatments for chlorophyll content and leaf area index.

Treatment
RDFe0
Outcome
chlorophyll content, leaf area indexe0
Direction
outperformede0
Comparator
all treatmentse0

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Oryza sativa
Oryza sativa · Taxon · picture from its Wikimedia Commons categoryDesmanthus4food · CC BY-SA 3.0 us · Wikimedia Commons ↗

Verbatim

e0

“RDF significantly outperformed all treatments in quantitative parameters (plant height, tiller density, grain yield, straw yield) and qualitative parameters (chlorophyll content, leaf area index)”

✓ located verbatim in the source · abstract, characters 335–530 · show in text ↑
t0

“rice”

✓ located verbatim in the source · title, characters 44–48 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Neem-coated urea ranked below RDF but above nano urea and control.

Treatment
NCUe0
Outcome
followed by NCU, NU and the controle0
Direction
followede0
Comparator
NU and the controle0

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Oryza sativa
Oryza sativa · Taxon · picture from its Wikimedia Commons categoryDesmanthus4food · CC BY-SA 3.0 us · Wikimedia Commons ↗

Verbatim

e0

“followed by NCU, NU and the control”

✓ located verbatim in the source · abstract, characters 532–567 · show in text ↑
t0

“rice”

✓ located verbatim in the source · title, characters 44–48 · show in text ↑
Recommendationauthor interpretationoriginal resultpositivebasis n/a

Claim · model-written summary

The authors recommend RDF as the most effective option for rice productivity.

Treatment
RDFe0
Outcome
RDF as the most effective option for optimizing rice productivitye0
Setting
this regione0

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Oryza sativa
Oryza sativa · Taxon · picture from its Wikimedia Commons categoryDesmanthus4food · CC BY-SA 3.0 us · Wikimedia Commons ↗

Verbatim

e0

“These findings position RDF as the most effective option for optimizing rice productivity in this region”

✓ located verbatim in the source · abstract, characters 1016–1120 · show in text ↑
t0

“rice”

✓ located verbatim in the source · title, characters 44–48 · show in text ↑

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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.