Paper · 2025 · Journal of the Indian Society of Soil Science

Neem Coated Urea for Higher Nitrogen Use Efficiency and Sustainable Soil and Crop Productivity in Sugarcane Plant-Ratoon Sequence

Ch S. Rama Lakshmi; T. Sreelatha; A. Sireesha; et al.

9
claims
18
verbatim quotes
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citations
2
research areas
✓
Open access

Abstract

Field experiment was conducted at Regional Agricultural Research Station, Anakapalle in Anakapalle district of Andhra Pradesh in two subsequent seasons in sugarcane plant-ratoon sequence. Results revealed that significantly higher values of nitrogen use efficiency was observed with neem coated urea over normal urea. Significantly highest nitrogen uptake was recorded with 150% neem coated urea in plant and ratoon crops, respectively. An additional nitrogen uptake of 5 kg ha-1 was observed in neem coated urea than normal urea. There was no depletion of available nitrogen in post harvest soils and that was observed in both plant and ratoon crops in nitrogen treated plots irrespective of source of nitrogen. Available nitrogen status increased with increasing levels of nitrogen. Regarding available phosphorus and potassium, there were no significant differences among different nitrogen levels. Highest juice brix juice sucrose and juice purity were recorded with lower levels of nitrogen i.e 75% and 100% neem coated urea over higher doses of nitrogen i.e 125% and 150% neem coated urea. However, there was no significant difference between neem coated urea and normal urea regarding juice quality. Numerically higher cane and sugar yields were recorded with neem coated urea over normal urea.

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Claims 9

Intervention effectobservedoriginal resultpositivesignificant (as stated)measured

Claim · model-written summary

Neem-coated urea significantly increased nitrogen-use efficiency over normal urea.

Taxon
Sugarcanet0
Treatment
neem coated ureae0
Outcome
nitrogen use efficiencye0
Direction
highere0
Comparator
normal ureae0

Verbatim

e0

“significantly higher values of nitrogen use efficiency was observed with neem coated urea over normal urea.”

✓ located verbatim in the source · abstract, characters 210–317 · show in text ↑
t0

“Sugarcane”

✓ located verbatim in the source · title, characters 98–107 · show in text ↑
Intervention effectobservedoriginal resultpositivesignificant (as stated)measured

Claim · model-written summary

The 150% neem-coated urea dose gave the highest nitrogen uptake in plant and ratoon crops.

Taxon
Sugarcanet0
Organ / stage
plant and ratoon cropse0
Treatment
150% neem coated ureae0
Outcome
nitrogen uptakee0
Direction
higheste0

Not reportedComparator

Verbatim

e0

“Significantly highest nitrogen uptake was recorded with 150% neem coated urea in plant and ratoon crops, respectively.”

✓ located verbatim in the source · abstract, characters 318–436 · show in text ↑
t0

“Sugarcane”

✓ located verbatim in the source · title, characters 98–107 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Neem-coated urea increased nitrogen uptake by 5 kg ha-1 over normal urea.

Taxon
Sugarcanet0
Treatment
neem coated ureae0
Outcome
nitrogen uptakee0
Direction
additionale0
Value
5 kg ha-1e0
Comparator
normal ureae0

Verbatim

e0

“An additional nitrogen uptake of 5 kg ha-1 was observed in neem coated urea than normal urea.”

✓ located verbatim in the source · abstract, characters 437–530 · show in text ↑
t0

“Sugarcane”

✓ located verbatim in the source · title, characters 98–107 · show in text ↑
Observationobservedoriginal resultpositivemeasured

Claim · model-written summary

Postharvest soil nitrogen was not depleted in nitrogen-treated plots.

Taxon
Sugarcanet0
Outcome
available nitrogen in post harvest soilse0
Direction
no depletione0
Qualifier
nitrogen treated plots irrespective of source of nitrogene0

Verbatim

e0

“There was no depletion of available nitrogen in post harvest soils and that was observed in both plant and ratoon crops in nitrogen treated plots irrespective of source of nitrogen.”

✓ located verbatim in the source · abstract, characters 531–712 · show in text ↑
t0

“Sugarcane”

✓ located verbatim in the source · title, characters 98–107 · show in text ↑
Associationobservedoriginal resultpositivemeasured

Claim · model-written summary

Available soil nitrogen increased with nitrogen level.

Taxon
Sugarcanet0
Treatment
increasing levels of nitrogene0
Outcome
Available nitrogen statuse0
Direction
increasede0

Verbatim

e0

“Available nitrogen status increased with increasing levels of nitrogen.”

✓ located verbatim in the source · abstract, characters 713–784 · show in text ↑
t0

“Sugarcane”

✓ located verbatim in the source · title, characters 98–107 · show in text ↑
Intervention effectobservedoriginal resultno effectnot significant (as stated)measured

Claim · model-written summary

Available phosphorus and potassium did not differ significantly among nitrogen levels.

Taxon
Sugarcanet0
Treatment
different nitrogen levelse0
Outcome
available phosphorus and potassiume0
Direction
no significant differencese0

Not reportedComparator

Verbatim

e0

“Regarding available phosphorus and potassium, there were no significant differences among different nitrogen levels.”

✓ located verbatim in the source · abstract, characters 785–901 · show in text ↑
t0

“Sugarcane”

✓ located verbatim in the source · title, characters 98–107 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Lower neem-coated urea levels gave the highest juice brix, sucrose, and purity versus higher doses.

Taxon
Sugarcanet0
Treatment
75% and 100% neem coated ureae0
Outcome
juice brix juice sucrose and juice puritye0
Direction
Higheste0
Comparator
125% and 150% neem coated ureae0

Verbatim

e0

“Highest juice brix juice sucrose and juice purity were recorded with lower levels of nitrogen i.e 75% and 100% neem coated urea over higher doses of nitrogen i.e 125% and 150% neem coated urea.”

✓ located verbatim in the source · abstract, characters 902–1095 · show in text ↑
t0

“Sugarcane”

✓ located verbatim in the source · title, characters 98–107 · show in text ↑
Intervention effectobservedoriginal resultno effectnot significant (as stated)measured

Claim · model-written summary

Juice quality did not differ significantly between neem-coated and normal urea.

Taxon
Sugarcanet0
Treatment
neem coated ureae0
Outcome
juice qualitye0
Direction
no significant differencee0
Comparator
normal ureae0

Verbatim

e0

“there was no significant difference between neem coated urea and normal urea regarding juice quality.”

✓ located verbatim in the source · abstract, characters 1105–1206 · show in text ↑
t0

“Sugarcane”

✓ located verbatim in the source · title, characters 98–107 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Neem-coated urea gave numerically higher cane and sugar yields.

Taxon
Sugarcanet0
Treatment
neem coated ureae0
Outcome
cane and sugar yieldse0
Direction
Numerically highere0
Comparator
normal ureae0

Verbatim

e0

“Numerically higher cane and sugar yields were recorded with neem coated urea over normal urea.”

✓ located verbatim in the source · abstract, characters 1207–1301 · show in text ↑
t0

“Sugarcane”

✓ located verbatim in the source · title, characters 98–107 · show in text ↑

nitrogen · yield · Saccharum officinarum (sugarcane)Results differ

137 papers: 118 positive, 19 negative or no effect

117 papers in the same direction as this paper · 15 in the opposite direction · 4 reporting no difference from an alternative

  1. no effect
  2. negative
  3. negative

133 papers more in this group

See all 137 papers →

botanical · quality: general · Saccharum officinarum (sugarcane)Positive and negative results

2 papers: 1 positive, 1 negative or no effect

1 in the opposite direction

  1. positive
See all 2 papers →

nitrogen · soil: chemistry · Saccharum officinarum (sugarcane)Positive and negative results

10 papers: 9 positive, 1 negative or no effect

9 in the opposite direction

  1. positive
  2. positive
  3. positive

6 papers more in this group

See all 10 papers →

nitrogen · nutrient: efficiency · Saccharum officinarum (sugarcane)Positive and negative results

11 papers: 6 positive, 5 negative or no effect

5 papers in the same direction as this paper · 5 in the opposite direction

  1. negative
  2. no effect
  3. negative

7 papers more in this group

See all 11 papers →

nitrogen · quality: general · Saccharum officinarum (sugarcane)Positive and negative results

21 papers: 11 positive, 10 negative or no effect

9 papers in the same direction as this paper · 11 in the opposite direction

  1. positive
  2. positive
  3. positive

17 papers more in this group

See all 21 papers →

nitrogen · nutrient: content · Saccharum officinarum (sugarcane)Positive and negative results

31 papers: 23 positive, 8 negative or no effect

22 papers in the same direction as this paper · 8 in the opposite direction

  1. no effect
  2. negative
  3. negative

27 papers more in this group

See all 31 papers →

nitrogen · quality: sugar starch · Saccharum officinarum (sugarcane)Positive and negative results

40 papers: 32 positive, 8 negative or no effect

31 papers in the same direction as this paper · 8 in the opposite direction

  1. negative
  2. negative
  3. negative

36 papers more in this group

See all 40 papers →

botanical · quality: sugar starch · Saccharum officinarum (sugarcane)Results agree

2 papers: 2 positive, 0 negative or no effect

1 paper in the same direction as this paper

  1. positive
See all 2 papers →

8 of 10 groups shown: named compounds and organisms first, then groups whose results differ (checked claim by claim), then those with positive and negative results, then the smaller groups.

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.