Search claims · PlantClaims

Associationobservedoriginal resultnegativemeasured

Claim · model-written summary

Nitrogen partial factor productivity fell with higher nitrogen.

Outcome: N partial factor productivity (PFPN)e0

Not reportedTaxonTreatmentDirection

Verbatim

e0
“while N partial factor productivity (PFPN) did the opposite.”
✓ located verbatim in the source · abstract, characters 1505–1565

Title

Effects of Water and Nitrogen Regulation on Cotton Growth and Hydraulic Lift under Dry Topsoil Conditions

Zhiyu Wang; Kun Zhang; Guangcheng Shao; et al. Agronomy 2023. doi:10.3390/agronomy13123022

Other claims from this paper (14)

Association Height and leaf area increased with nitrogen rate.
Association Water condition differences in growth were small apart from 2021 leaf area.
Observation Hydraulic lift rose then declined during observation.
Association Drier topsoil was associated with more hydraulic lift.
Association More nitrogen was associated with more hydraulic lift.
Association Topsoil water and nitrogen significantly affected total hydraulic lift.
Association Topsoil water and nitrogen significantly affected root morphology.
Association Seed yield tended to fall as topsoil dried at N240 or N360.
Association Lint yield tended to fall as topsoil dried, except in 2021.
Association Seed and lint yield tended to fall as nitrogen rate fell.
Association Evapotranspiration decreased as topsoil dried.
Association Nitrogen rate made little difference to evapotranspiration.
Association Water use efficiency increased with nitrogen.
Association PFPN under W0.4 was lower than W0.6 at N240 or N120.

Observationobservedoriginal resultnegativesignificant (as stated)measured

Claim · model-written summary

Partial factor productivity for applied nitrogen declined significantly.

Outcome: partial factor productivity for applied nitrogene0
Direction: decreasede0

Not reportedTaxon

Verbatim

e0
“The partial factor productivity for applied nitrogen and soil nitrogen dependent rate were decreased significantly”
✓ located verbatim in the source · abstract, characters 838–952

Title

Effects of different nitrogen on dry matter accumulation and nitrogen use efficiency of oriental tobacco

Zhan Jun Turang feiliao 2011

Other claims from this paper (12)

Association Dry matter of organs and whole plants increased with nitrogen fertilizer.
Association Accumulation intensity initially rose and then fell with nitrogen.
Observation Dry matter allocation among organs differed through the growing season.
Association Yield increased with nitrogen fertilizer.
Observation Economic characters increased.
Observation Production rate was 80.43% to 140.23%.
Observation Value rate was 66.90% to 116.20%.
Observation Nitrogen harvest index increased.
Observation Agronomic nitrogen use efficiency initially rose then fell.
Observation Apparent nitrogen recovery efficiency initially rose then fell.
Observation Physiological nitrogen use efficiency initially rose then fell.
Observation Soil nitrogen dependence rate declined significantly.

Associationobservedoriginal resultnegativemeasured

Claim · model-written summary

Nitrogen partial factor productivity declined as nitrogen application increased.

Treatment: N application ratee0
Outcome: N partial factor productivitye0
Direction: declinede0

Not reportedTaxon

Verbatim

e0
“N partial factor productivity declined with increasing N application rate”
✓ located verbatim in the source · abstract, characters 934–1007

Title

Economically Optimal Rate for Nutrient Application to Maize in the Semi-deciduous Forest Zone of Ghana

Benedicta Essel; Robert Clement Abaidoo; Andrews Opoku; et al. Journal of soil science and plant nutrition 2020. doi:10.1007/s42729-020-00240-y

Other claims from this paper (7)

Intervention effect A nitrogen rate of 60 kg ha −1 gave the best grain yield of 5 t ha − 1 across phosphorus and potassium levels.
Intervention effect Nitrogen uptake peaked at 60 kg N ha − 1.
Intervention effect Nitrogen agronomic and recovery efficiencies peaked at 60 kg N ha − 1.
Observation Cost to grain price ratios were 1.29, 1.65 and 1.65 for N, P and K, respectively.
Observation Economically optimal nitrogen was 61 kg ha −1, 32% below the recommended 90 kg N ha −1.
Observation Nitrogen application had the lowest cost to grain price ratio and was economically more profitable than P and K.
Recommendation The authors recommend applying 61 kg N ha −1 to maize rather than higher rates for profitability.

Intervention effectauthor interpretationoriginal resultpositivemeasured

Claim · model-written summary

The F1I2 combination optimized partial factor productivity of nitrogen fertilizer.

Taxon: maizeZea mayst0
Treatment: F1I2e1
Outcome: partial factor productivity of nitrogen fertilizer (PFPN)e0
Direction: optimizede0

Not reportedComparator

Verbatim

e0
“which ultimately optimized yield and partial factor productivity of nitrogen fertilizer (PFPN)”
✓ located verbatim in the source · abstract, characters 1245–1339

e1
“The synergistic effect of F1I2”
✓ located verbatim in the source · abstract, characters 935–965

t0
“maize”
✓ located verbatim in the source · title, characters 62–67

Title

Shallow buried drip irrigation with water regulation enhances maize yield, water productivity, and partial factor productivity of nitrogen fertilizer

Yongqi Liu; Guanghua Yin; Weishu Wang; et al. Agricultural Water Management 2026. doi:10.1016/j.agwat.2026.110299

Other claims from this paper (10)

Intervention effect Irrigation every 7 days raised nitrate reductase activity at jointing by 33% relative to every 21 days.
Intervention effect Irrigation every 7 days raised nitrate reductase activity at tasseling by 17% relative to every 21 days.
Intervention effect The 80% evapotranspiration irrigation quota enhanced glutamine synthetase activity by 19%–40% relative to other treatments.
Intervention effect The 80% evapotranspiration irrigation quota enhanced nitrate reductase activity by 15%–32% relative to other treatments.
Intervention effect The F1I2 combination significantly promoted nitrogen accumulation.
Intervention effect The F1I2 combination significantly promoted nitrogen translocation.
Intervention effect The F1I2 combination significantly promoted contribution rate to grain nitrogen.
Mechanism F1I2 produced higher grain nitrogen accumulation at the milky stage by stimulating GS and NR activities and nitrogen translocation.
Intervention effect The F1I2 combination optimized maize yield.
Recommendation The authors recommend irrigation once every 7 days at 80% ET c under SBDI for resource efficiency and high maize productivity.

Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

Nitrogen partial factor productivity was reduced as nitrogen application increased.

Taxon: Kidney BeanPhaseolus vulgarist1
Treatment: increase of nitrogen applicatione2
Outcome: nitrogen partial factor productivitye2
Direction: reducede2

Not reportedComparator

Verbatim

t1
“Yield of Kidney Bean”
✓ located verbatim in the source · title, characters 62–82

e2
“with the increase of nitrogen application, nitrogen partial factor productivity has reduced”
✓ located after whitespace/quote normalisation · abstract, characters 932–1022

Title

Effect of Nitrogen Application on Nitrogen Use Efficiency and Yield of Kidney Bean

Song Jin-ton Nongye xiandaihua yanjiu 2013

Other claims from this paper (12)

Intervention effect Yield under the N30 treatment was the largest among the four kidney bean varieties.
Association Nitrogen fertilizer and yield showed a close relation in the regression fit.
Observation The best nitrogen application rate for Pinyun 2 was 39.01 kg/hm2.
Observation The best nitrogen application rate for British red kidney bean was 29.82 kg/hm2.
Observation The best nitrogen application rate for Longyun 6 was 33.72 kg/hm2.
Observation The best nitrogen application rate for Longyun 4 was 32.15 kg/hm2.
Association Nitrogen uptake of the four kidney bean varieties increased with dry matter accumulation.
Intervention effect Nitrogen recovery efficiency under N30 was higher than under other treatments in the four kidney bean varieties.
Intervention effect Low nitrogen treatment improved nitrogen agronomic efficiency of kidney bean.
Intervention effect Physiological efficiency of Pinyun 2 and British red kidney bean was highest at N15.
Intervention effect Physiological efficiency of Longyun 6 peaked at N60.
Intervention effect Physiological efficiency of Longyun 4 peaked at N30.

Associationobservedoriginal resultnegativesignificant (as stated)measured

Claim · model-written summary

Partial nitrogen factor productivity decreased significantly as nitrogen rate increased.

Taxon: oil flaxe0
Treatment: nitrogen levelt0
Outcome: partial nitrogen factor productivitye0
Direction: decreasede0

Verbatim

e0
“The partial nitrogen factor productivity of oil flax decreased significantly”
✓ located verbatim in the source · abstract, characters 1173–1249

t0
“different nitrogen level”
✓ located verbatim in the source · title, characters 10–34

Title

Effect of different nitrogen level on nutrients accumulation,transfer and nitrogen utilization efficiency of dry land oil flax

Xie Ya-pin 2014

Other claims from this paper (13)

Intervention effect Nitrogen application rates affected uptake, accumulation and transfer across growth stages.
Observation Leaf nitrogen translocation amount exceeded stem by 89.18%.
Observation Leaf translocation efficiency exceeded stem by 83.36%.
Observation Leaf contribution to grain exceeded stem by 86.36%.
Observation Leaf transfer supplied 47.10–57.66% of grain nitrogen.
Observation Stem transfer supplied 22.46–30.94% of grain nitrogen.
Observation Soil uptake supplied 21.00–30.48% of grain nitrogen.
Intervention effect Nitrogen at 27.6 kg·hm-2 increased yield by 10.21% against no application.
Intervention effect Nitrogen at 55.2 kg·hm-2 increased yield by 16.92%.
Intervention effect Nitrogen at 82.8 kg·hm-2 increased yield by 15.55%.
Observation Leaf and stem nitrogen transfer amounts, efficiencies and contributions to grain were maximal at 55.2 kg·hm-2.
Association Apparent nitrogen recovery efficiency first rose then fell with increasing nitrogen rate.
Recommendation The authors recommend 27.6–55.2 kg·hm-2 nitrogen fertilizer for dry land oil flax at the tested soil fertility.

Associationobservedoriginal resultmeasured

Claim · model-written summary

Partial factor productivity decreased as nitrogen application rate increased.

Taxon: rapeseedt0
Treatment: nitrogen application ratee5
Outcome: partial factor productivitye5
Direction: decreasede5

Verbatim

t0
“Direct-seeding Rapeseed”
✓ located verbatim in the source · title, characters 34–57

e5
“With the increase of nitrogen application rate,partial factor productivity was decreased”
✓ located verbatim in the source · abstract, characters 524–612

Title

Effects of Nitrogen Fertilizer on Direct-seeding Rapeseed in Jianghuai Region,Anhui

Ji Wu Anhui nongye kexue 2011

Other claims from this paper (9)

Intervention effect Nitrogen fertilizer significantly increased the yield of direct-seeding rapeseed.
Association Rapeseed yield improved as the amount of N fertilizer increased.
Intervention effect The N360 treatment achieved the highest yield in the three test plots.
Observation No obvious rule was found for N agronomic use efficiency across N rates.
Intervention effect Nitrogen fertilizer significantly increased the economic benefits of direct-seeding rapeseed.
Observation The N360 treatment achieved the maximum income of 7 494.95 yuan/hm2.
Observation The N360 treatment achieved the maximum net profit of 6 234.95 yuan/hm2.
Observation The N270 treatment achieved the best VCR of 3.12.
Recommendation The appropriate nitrogen amount for direct-seeding rapeseed is 270-360 kg/hm2 in Jianghuai Region, Anhui.

Observationobservedoriginal resultmeasured

Claim · model-written summary

Partial factor productivity declined gradually as nitrogen rates increased in both seasons.

Taxon: maizeZea mayst0
Treatment: nitrogen ratese0
Outcome: partial factor productivitye0
Direction: decreasee0

Verbatim

e0
“Increase in nitrogen rates was associated with a gradual decrease in partial factor productivity in both seasons”
✓ located verbatim in the source · abstract, characters 1243–1355

t0
“maize hybrids”
✓ located verbatim in the source · title, characters 32–45

Title

Nitrogen use efficiency of some maize hybrids

Hoda Kh; A. El-Mekser; Shimaa A. Badawy 2015

Other claims from this paper (11)

Intervention effectobservedoriginal resultpositivesignificant (as stated)measured

Claim · model-written summary

Functional urea significantly increased nitrogen partial factor productivity.

Taxon: riceOryza sativat0
Outcome: nitrogen and fertilizer partial factor productivitye0
Direction: increasede0

Not reportedTreatmentComparator

Verbatim

e0
“Both the nitrogen and fertilizer partial factor productivity increased significantly”
✓ located verbatim in the source · abstract, characters 1017–1101

t0
“rice”
✓ located after whitespace/quote normalisation · title, characters 120–124

Title

Effects of Different Novel Functional Urea on the Yield and Efficiency of Nitrogen Absorption and Utilization of Hybrid Rice

XU Feng-yin Hubei nongye kexue 2014

Other claims from this paper (16)

Intervention effect CRU yielded 10.21 t/hm2, 8.73% above conventional urea.
Intervention effect PU yielded 10.36 t/hm2, 10.33% above conventional urea.
Intervention effect SU yielded 10.24 t/hm2, 9.05% above conventional urea.
Intervention effect ZCU yielded 10.31 t/hm2, 9.80% above conventional urea.
Intervention effect PU increased nitrogen absorption and use efficiency by 52.77%.
Intervention effect ZCU increased nitrogen absorption and use efficiency by 81.92%.
Intervention effect SU increased nitrogen absorption and use efficiency by 56.21%.
Intervention effect CRU increased nitrogen absorption and use efficiency by 65.41%.
Intervention effect PU increased rice agronomic efficiency by 49.94%.
Intervention effect ZCU increased rice agronomic efficiency by 59.15%.
Intervention effect SU increased rice agronomic efficiency by 51.86%.
Intervention effect CRU increased rice agronomic efficiency by 56.08%.
Intervention effect PU decreased nitrogen physiological efficiency by 12.56%.
Intervention effect ZCU decreased nitrogen physiological efficiency by 5.65%.
Observation Functional urea significantly increased nitrogen absorption and dry matter accumulation in middle-to-late growth.
Intervention effect Yields did not differ significantly among the four novel ureas.

Observationobservedoriginal resultnegativemeasured

Claim · model-written summary

Partial factor productivity of nitrogen was low under CP.

Treatment: CPe0
Outcome: partial factor productivity of nitrogene0
Direction: lowe0

Not reportedTaxon

Verbatim

e0
“While CP significantly decreased the NPK loss rates, the partial factor productivity of nitrogen was low.”
✓ located verbatim in the source · abstract, characters 1084–1189

Title

Effect of Different Cultivation Techniques on Rice Yield and NPK Runoff Losses

Hongjian Liu Nongye huanjing kexue xuebao 2015

Other claims from this paper (9)

Intervention effect SP increased rice yield by 11.1% relative to CP.
Intervention effect RP showed no obvious difference from CP in rice yield.
Observation Total nitrogen, phosphorus and potassium runoff loss amounts differed significantly among treatments.
Intervention effect NPK runoff loss rates did not differ significantly between RP and CP.
Intervention effect NPK runoff loss rates under RP were significantly higher than under SP.
Intervention effect SP significantly increased total nitrogen, phosphorus and potassium losses.
Intervention effect RP significantly decreased total nitrogen, phosphorus and potassium losses relative to CP.
Intervention effect RP increased partial factor productivity of nitrogen.
Intervention effect CP significantly decreased NPK loss rates.

“Partial factor productivity of Nitrogen”

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