Paper · 2025 · EURASIAN JOURNAL OF SOIL SCIENCE (EJSS)

Effects of nitrogen application on potato (Solanum tuberosum L.) yield and soil nitrate dynamics in a sandy loam soil

Rakhmetulla Zhapparbergenov; Naziya Suleimenova; Elmira Yeleuova; et al.

2
claims
5
verbatim quotes
0
citations
1
research areas
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Open access · cc-by-sa

Abstract

Nitrogen (N) is a crucial nutrient for potato (Solanum tuberosum L.) production, but excessive application can lead to environmental degradation and reduced nitrogen use efficiency (NUE). This study evaluated the effects of different nitrogen application rates (0, 60, 120, 150, 180, 210, and 240 kg N/ha) on tuber yield, nitrogen uptake, and soil nitrate accumulation over two growing seasons. The results showed that the highest tuber yield (20.8 t/ha) was obtained at 150 kg N/ha, beyond which further increases in nitrogen application did not result in significant yield improvements (P

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

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Claims 2

Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Tuber yield was highest (20.8 t/ha) at 150 kg N/ha.

Treatment
150 kg N/hae0
Outcome
tuber yielde0
Direction
higheste0
Value
20.8 t/hae0

Not reportedComparator

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

Solanum tuberosum
Solanum tuberosum · TaxonScott Bauer, USDA ARS · Public domain · Wikimedia Commons ↗

Verbatim

e0

“the highest tuber yield (20.8 t/ha) was obtained at 150 kg N/ha”

✓ located verbatim in the source · abstract, characters 419–482 · show in text ↑
e2

“crucial nutrient for potato (Solanum tuberosum L.) production”

✓ located verbatim in the source · abstract, characters 18–79 · show in text ↑
Intervention effectobservedoriginal resultno effectnot significant (as stated)measured

Claim · model-written summary

Nitrogen application above 150 kg N/ha did not give significant tuber yield improvements.

Treatment
further increases in nitrogen applicatione1
Outcome
yield improvementse1
Direction
no_changeinferrede1
Comparator
150 kg N/hae0

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

Solanum tuberosum
Solanum tuberosum · TaxonScott Bauer, USDA ARS · Public domain · Wikimedia Commons ↗

Verbatim

e1

“beyond which further increases in nitrogen application did not result in significant yield improvements (P”

✓ located verbatim in the source · abstract, characters 484–590 · show in text ↑
e0

“the highest tuber yield (20.8 t/ha) was obtained at 150 kg N/ha”

✓ located verbatim in the source · abstract, characters 419–482 · show in text ↑
e2

“crucial nutrient for potato (Solanum tuberosum L.) production”

✓ located verbatim in the source · abstract, characters 18–79 · show in text ↑

nitrogen · yield · Solanum tuberosum (potato)Results differ

132 papers: 109 positive, 23 negative or no effect

108 papers in the same direction as this paper · 20 in the opposite direction · 3 reporting no difference from an alternative

  1. positive
  2. positive
  3. no effect

128 papers more in this group

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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.