nitrogen · Quality: sugar starch · Beta vulgaris (beet)

Results differ103 papers: 66 positive, 37 negative or no effect · 1 pair of papers confirmed to differ

136 claims from these papers; 41 citations between them.

Papers whose results differ, checked claim by claim 1

1 pair of papers on this question report results that differ: an effect in one paper, the opposite effect or no effect in the other. Two model reviewers reading both claims accepted each pair.

Effect of N2-fixing bacterial inoculations on yield of sugar beet and barley (2001)
increaseN application increased sugar beet sugar yield by 6.1%.
Study on the effect of yield and quality in sugarbeet with different nitrogen amount applied (2000)
decreaseExcessive nitrogen reduced sugar yield.
What separates themSituation: not stated · toxic levelCompare the two papers →

How these papers cite each other

41 citations between these papers: 29 on the same side, 12 across the two sides.

Positive result
Negative result or no effect
Citation, pointing to the cited paper
Citation across the two sides
Larger circle: more citations overall

Years run left to right. Citations come from the papers’ OpenAlex reference lists. Hover a paper to bring forward its citations; click it to open the paper.

Papers reporting a positive result 66

The value of calcium nitrate and urea for sugar beet, and the effect of late nitrogenous top dressings · 1960
- positive
  All seedbed nitrogen matched a split dressing for sugar yield.
  compared with a split dressing
- positive
  Urea matched ammonium sulphate for sugar-yield increase.
  compared with ammonium sulphate
Varietal response by sugar beet to nitrogen, sodium and potassium fertilizers · 1974
- positive
  An application of 75 kg N/ha increased sugar yield similarly across the varieties.
Nitrogen requirements of sugar beet in relation to harvesting date · 1976
- positive
  Sugar content was depressed less at the late harvest than at the early harvest as nitrogen rate increased.
  compared with early
Influence of Nitrogen Supply on Yield and Quality of Sugar Beet · 1990
- positive
  White sugar yield increased with nitrogen supply, peaking at 129 kg N/ha.
- positive
  Sugar yield increased with nitrogen supply, peaking at 136 kg N/ha.
- negative
  Sugar concentration decreased as nitrogen supply increased.
- negative
  Sugar concentration declined slightly at nitrogen supply below 32 kg N/ha.
  compared with 32 kg N/ha
- negative
  White sugar concentration decreased as nitrogen supply increased, with a greater response than sugar concentration.
- negative
  Sugar and white sugar yield fell at nitrogen levels above optimum.
cites 2 papers herecited by 1 paper here
Sugarbeet Response to Nitrogen as Affected by Seasonal Irrigation · 1990
- positive
  In 1986 and 1987, sucrose yield of sugarbeet increased by 0.54 in response to N at irrigation levels averaging 0 mm.
- positive
  In 1986 and 1987, sucrose yield of sugarbeet increased by 1.76 in response to N at irrigation levels averaging 234 mm.
- positive
  In 1986 and 1987, sucrose yield of sugarbeet increased by 2.65 in response to N at irrigation levels averaging 435 mm.
EFFECT OF SOIL AND FOLIAR APPLICATION OF NITROGEN AND POTASSIUM ON SUGAR BEET · 1998
- positive
  Soil nitrogen at 90 kg N/fed or foliar nitrogen at 1.5% N significantly increased total plant weight and sugar yield per plant.
cited by 1 paper here
EFFECT OF IRRIGATION INTERVALS, FURROW IRRIGATION SYSTEM AND NITROGEN FERTILIZER LEVELS ON SUGAR BEET YIELD AND ITS WATER RELATIONS AT NORTH DELTA · 2000
- positive
  The 3-week interval, alternative furrow irrigation and recommended nitrogen rate gave the best sugar yield.
EFFECT OF PHOSPHORUS AND NITROGEN RATES AND TIME OF NITROGEN APPLICATION ON YIELD AND JUICE QUALITY OF SUGAR BEET · 2000
- positive
  Increasing nitrogen raised sugar yield by 460 kg.
cited by 1 paper here
INFLUENCE OF NITROGEN FERTILIZER ON SOME QUALITY, TECHNOLOGICAL ASPECTS, PRODUCTIVITY AND AMINO ACIDS ACCUMULATION OF SUGAR BEET · 2000
- positive
  Nitrogen at 90 kg N/fed gave the highest root and sugar yields.
  compared with RR
cited by 1 paper here
EFFECT OF NITROGEN AND POTASSIUM FERTILIZATION ON YIELD AND QUALITY OF SUGAR BEET IN SOHAG · 2000
- positive
  Increasing nitrogen to 92 kg N/fed significantly increased sugar yield.
cited by 3 papers here
Effect of N2-fixing bacterial inoculations on yield of sugar beet and barley · 2001
- positive
  N application increased sugar beet sugar yield by 6.1%.
Effect of N2-fixing bacterial inoculations on yield of sugar beet and barley · 2001
- positive
  N, P and NP fertilizer applications increased sugar beet sugar yield by 6.1%, 4.0% and 14.8% respectively.
The crop as indicator for sidedress nitrogen demand in sugar beet production — limitations and perspectives · 2002
- positive
  Beet yield and processed white sugar yield increased with N supply up to 160 kg ha—1 in sugar beet
EFFECT OF SOIL AND FOLIAR APPLICATION OF NITROGEN FERTILIZATION ON SUGAR BEET · 2002
- positive
  The same treatments increased sugar yield per feddan.
- negative
  Higher nitrogen and repeated urea reduced TSS, sucrose and juice purity percentages.
cites 1 paper herecited by 4 papers here
Effects of Applied Different Nitrogen Amounts on Yield and Quality of Sugar Beet · 2004
- positive
  Sugar beet sugar content was high, at 17.2%, when 180 kg/ha nitrogen was applied.
- positive
  Sugar beet sugar yield was high, at 5073.0 kg/ha, when 180 kg/ha nitrogen was applied.
Effect of N Fertilization Rate on Sugar Yield and Non‐Sugar Impurities of Sugar Beets (Beta vulgaris) Grown Under Mediterranean Conditions · 2005
- positive
  Root and sugar yield were maximized at higher N rates when expressed as relative values to the control mean.
- negative
  Sucrose content was strongly and linearly reduced by increased N rates when data were combined.
- negative
  Increased N rates had negative effects on root and sugar yield in three trials.
cited by 2 papers here
INFLUENCE OF NITROGEN AND POTASSIUM FERTILIZATION ON YIELD AND QUALITY OF TWO SUGAR BEET VARIETIES. · 2005
- positive
  Kawemira with 95 kg N/fed and 48 kg K20/fed had highest sugar yields of 6.76 and 5.95 ton/fed.
- negative
  Increasing nitrogen decreased total soluble solids, sucrose and purity percentages.
cited by 1 paper here
EFFECT OF NITROGEN FERTILIZATION AND HARVEST DATE ON YIELD, YIELD COMPONENTS AND QUALITY OF SUGAR BEET · 2005
- positive
  The 90 kg N/fed rate produced the highest recoverable sugar yield.
cited by 2 papers here
EFFECT OF SOIL SALINITY, NITOGEN FERTILIZATION LEVELS AND POTASSIUM FERTILIZATION FORMS ON GROWTH, YIELD AND QUALITY OF SUGAR BEET CROP IN EASTNORTHERN DELTA OF EGYPT · 2006
- positive
  90 kg N/fed increased sugar yield by 14.96.
  compared with control treatment (30 kg N/fed)
- positive
  90 kg N/fed increased sugar yield by 10.7%.
  compared with control treatment (30 kg N/fed)
EFFECT OF SOME WEED CONTROL TREATMENTS AND NITROGEN FERTILIZER LEVELS ON YIELD AND QUALITY OF SUGAR BEET CROP UNDER NEWLY RECLAIMED LANDS · 2006
- positive
  Increasing nitrogen significantly increased sugar beet root diameter, root and leaf fresh weight, root, top and sugar yield, and T55.
EFFECT OF BACTERIAL BIOFERTILIZATION AND N-LEVELS ON YIELD AND QUALITY OF SUGAR BEET (VARIETY LOLA) · 2009
- positive
  Nitrogen application significantly increased top and root yields, root fresh weight, and sugar yield.
cited by 1 paper here
EFFECT OF FOLIAR FERTILIZATION WITH UREA AND GIBBERELLIC ACID ON SUGAR BEEt (Beta vulgaris L.). · 2009
- positive
  Urea foliar treatment increased TSS% in the first season.
cited by 1 paper here
RESPONSE OF SUGAR BEET TO NITROGEN FERTILIZER AND SULPHUR SPRAY FREQUENCY IN MIDDLE EGYPT · 2010
- positive
  Fertilization with 90 kg N/fed gave the highest sugar yield.
- positive
  90 kg N/fed combined with three sulphur foliar sprays gave the greatest increases in root and sugar yield.
Effects of N,P,K Fertilizer Application and Recommendation for Sugerbeet · 2011
- positive
  Maximum sugar yield of sugarbeet was 12978.47 kg/ha under N, P and K fertilizer application.
  compared with non-fertilizer application
- positive
  Sugar yield of sugarbeet increased by 38.97% under N, P and K fertilizer application compared with no fertilizer.
  compared with non-fertilizer application
INFLUENCE OF SOIL TYPE AND NITROGEN FERTILIZATION SUGAR BEET YIELD AND QUALITY · 2011
- positive
  Autumn nitrogen treatment increased sugar yield significantly under the stated wet T-1 and dry T-2 conditions without top dressing.
  compared with N-0
EFFECT OF NITROGEN FERTILIZER RATES AND SOME GROWTH REGULATORS TREATMENTS ON SUGAR BEET · 2011
- positive
  Increasing nitrogen from 0 to 110 kg N/fed increased sugar yield per fed by 136.70 and 142.60% over the control.
  compared with plants grown on the control treatment (no added nitrogen)
- positive
  The interaction of 110 kg N/fed with IAA at 200 ppm gave the highest sugar yield per fed (5.65 and 6.13 tons) compared with all other interaction treatments.
  compared with all other this interaction treatments
cites 1 paper here
RESPONSE OF SOME SUGAR BEET VARIETIES TO COMBINATIONS OF NITROGEN AND BORON FERTILIZATION. · 2011
- positive
  Treatment with 100 kg N/fed plus 150 ppm B significantly increased sugar yield of sugar beet compared with 100 kg N/fed with zero B.
  compared with 100 kg N/fed + zero B
EFFECT OF MICRO NUTRIENT COMPOUND, PHOSPHORUS RATES AND NITROGEN RATES AND ITS APPLICATION METHODS ON YIELD AND QUALITY OF SUGAR BEET (Beta vulgaris L.) UNDER TWO SOWING DATES · 2011
- positive
  Higher nitrogen rates increased sugar yield significantly in the first sowing of the first season and second sowing of the second season.
Improving Yield and Quality of Sugar Beet Using Boron at Different Levels of Nitrogen Fertilizer · 2011
- positive
  100 kg N/fed with 0.10% boron gave the highest recoverable sugar yield, 4.39 ton/fed.
  compared with the other
cited by 3 papers here
Effect of nitrogen fertilization on nitrate reductase and nitrite reductase activities of sugar beet · 2012
- positive
  Highest sugar yield of sugar beet was obtained under 120 kg/ha nitrogen.
- negative
  Sugar content rate of sugar beet decreased with increasing nitrogen level.
EFFECT OF BIO AND MINERAL FERTILIZATION ON YIELD AND QUALITY OF SUGAR BEET · 2012
- positive
  At 120 kg N/fed, TSS was highest.
cites 2 papers herecited by 2 papers here
EFFECT OF FARMYARD MANURE, PLANT DENSITY AND BIOFERTILIZER TREATMENTS ON GROWTH AND YIELD OF SUGAR BEET · 2012
- positive
  Combined high manure, density and nitrogen produced the highest sugar yield/fad.
  compared with all other this interaction treatments
- positive
  Mineral nitrogen gave the highest top yield/fad, root yield/fad and sugar yield/fad.
  compared with all other fertilization treatment
Impact of crop density and soil fertilization on sugar beet · 2013
- positive
  The combined biofertilizer, reduced nitrogen and density treatment gave maximum impure sugar yield.
- positive
  The combined biofertilizer, reduced nitrogen and density treatment gave maximum pure sugar yield.
cites 1 paper here
YIELD AND QUALITY OF SUGAR BEET AS AFFECTED BY ZINC FOLIAR APPLICATION UNDER DIFFERENT NITROGEN FERTILIZATION LEVELS · 2013
- positive
  The 90 kg N/fed plus 1.5 g Zn/l treatment produced the highest sugar yield in both seasons.
Root Yield and Quality of Sugar Beet (Beta vulgaris L.) in Response to Foliar Application with Urea, Zinc and Manganese in Newly Reclaimed Sandy Soil · 2014
- positive
  The triple foliar treatment gave the highest sugar yield of 2.460 t/ha.
- positive
  Urea plus zinc gave a sugar yield of 1.936 t/ha, second to the triple treatment.
EFFECT OF SOIL AMENDMENTS AND NITROGEN FERTILIZER SOURCES ON SUGAR BEET PRODUCTIVITY GROWN UNDER SALT AFFECTED SOIL CONDITIONS · 2014
- positive
  Combined amendments and nitrogen sources increased sugar beet root and sugar yield.
- positive
  Combined amendments and nitrogen sources increased TSS, sucrose and purity.
cited by 1 paper here
EFFECT OF MINERAL AND BIO-FERTILIZATION ON PRODUCTIVITY OF SUGAR BEET · 2014
- positive
  Sugar yield was highest with Azotobacter plus Azospirillum at 60 or 80 kg N/fed, followed by 100 kg N/fed.
cites 1 paper herecited by 1 paper here
Response of Sugarbeet for Distance Between Hills and Nitrogenous Levels under Different Sowing Dates · 2014
- positive
  Increasing nitrogen from 60 to 90 N kg/fed significantly increased root, fresh top and sugar yield.
  compared with 60
Response of Sugar Beet to Micronutrients Foliar Spray under Different Nitrogen Fertilizer Doses · 2014
- positive
  top and root yield/fad as well as sugar yield/fad in both seasons
cites 2 papers herecited by 1 paper here
Effect of Irrigation and Nitrogen Fertiziation on Sugar Beet Yield, Quality and Some Water Relations in Heavy Clay Soils · 2014
- positive
  Sugar yield, purity and nitrogen concentration in tops and roots rose with increasing water, nitrogen rate and dose.
AGRO-ECONOMIC IMPACT OF INTERCROPPING CANOLA AND ONION ON SOME SUGAR BEET VARIETIES UNDER DIFFERENT NITROGEN RATES · 2015
- positive
  Fertilized sole sugar beet plants with 100 kg N/feddan gave the highest sugar yield, 3.72 and 3.75 ton/fed.
cited by 1 paper here
EFFECT OF NITROGEN; POTASSIUM FERTILIZER AND PLANT DISTRIBUTION PATTERNS ON YIELD AND QUALITY OF SUGAR BEET (Beta vulgaris l.) · 2015
- positive
  Low nitrogen with high potassium produced the highest sucrose, soluble solids and purity percentages.
cites 2 papers here
IMPORTANCE OF NITROGEN AND MICROELEMENTS FOR SUGAR BEET PRODUCTION IN SANDY SOILS · 2016
- positive
  Sugar yield rose significantly as nitrogen increased to 90 kg N/fed.
Beet Crop under Different Fertilization and Nitrogen Fertigation in Protected Environment · 2017
- positive
  The highest nitrogen dose gave the best beet total soluble solids content.
Nutrients management strategies to improve yield and quality of sugar beet in semi-arid regions · 2017
- positive
  NP at 120:90 kg ha−1 gave the second highest polarizable sugar content in sugar beet compared with control plots.
  compared with control plots
- positive
  NP at 120:90 kg ha−1 gave the highest sugar yield in sugar beet compared with control plots.
  compared with control plots
cited by 1 paper here
Effect of some Irrigation Systems and Fertilizer Levels used under Water Stress on Growth, Yield and Quality for Sugar Beet Crop. (Beta vulgaris L) · 2017
- positive
  Increasing nitrogen up to 120 kg N/fed significantly increased white sugar yield in the first season only.
EFFECT OF MINERAL, BIO FERTILIZATION, HUMIC ACID AND THEIR INTERACTIONS ON SUGAR BEET · 2017
- positive
  The highest combined treatment gave gross sugar yield of 7.13t/fed.
cites 1 paper here
Sugar Beet Response to Nitrogen and Potassium Fertilization Treatments in Sandy Soil · 2017
- positive
  Nitrogen and potassium rates significantly increased soluble solids and sucrose concentration.
cites 5 papers here
Influence of Pigeon Manure Tea on some Physiological and Genetical Parameters of Sugar Beet · 2018
- positive
  Foliar 10% PMT with 40 kg N/fed (C4) gave the highest mean sugar yield compared with C2 and/or C3 in both seasons.
  compared with (C2) and/or (C3)
Yield and Quality of Sugar Beet under Boron and Mineral and Bio- Nitrogen Fertilization · 2018
- positive
  Increasing nitrogen with Rhizobacterin significantly increased sugar yield in sugar beet across both seasons.
Impact of conservation tillage and nitrogen on sugarbeet yield and quality · 2019
- positive
  Recoverable sucrose yield increased little as nitrogen rose from 56 to 224 kg ha−1.
cites 1 paper herecited by 2 papers here
Effect of nano fertilization on sugar beet · 2019
- positive
  The fertilizer combination gave the highest sugar yield per plant.
  compared with all other studied treatments
IMPACT OF SOWING MODELS, NITROGEN LEVELS AND BIOFERTILIZATION ON YIELDS AND QUALITY OF SUGAR BEET UNDER SANDY SOIL CONDITIONS · 2020
- positive
  Applying 90 kg N/fad gave the highest sugar yield.
cites 4 papers here
Effect of Intercropping Onion with Sugar Beet on Productivity of Both Crops and Root-Knot Nematodes Control under Different Onion Plant Densities and Slow-Release N Fertilizer Rates · 2020
- positive
  N rate of 80 kg/fad gave the highest sugar yield per fad.
cites 2 papers here
Effect of N Fertilizer and Growth Stimulating Bacteria on Growth Traits of Sugar Beet (Beta vulgaris L.) under Delayed Sowing Condition · 2020
- positive
  sugar content was 8 to 10% higher with bacteria and recommended nitrogen than with other treatments.
  compared with other treatments
YIELD AND QUALITY RESPONSE OF SOME SUGAR BEET VARIETIES TO NITROGEN AND BORON FERTILIZATION IN SANDY SOIL · 2020
- positive
  Nitrogen at 100 kg N/fed gave the highest sucrose, corrected sugar percentage, quality index, and yield.
cites 1 paper here
Response of Some Sugar Beet (Beta vulgaris L.) Cultivars to Organic Manure and Mineral Fertilizers under Sandy Calcareous Soil Condition at South Sinai-Egypt · 2021
- positive
  Salama with high manure and nitrogen had the highest root sucrose yield.
Comparative studies of the three nitrogen fertilizers forms as ammonium in sugar beet plants in salt-affected soils under Fayoum condition · 2021
- positive
  Applying 90 kg N per feddan gave the highest sugar yield per feddan.
cites 1 paper here
Water and nitrogen supply on photosynthetic physiological response of sugar beet (Beta vulgaris) under mulched drip irrigation · 2022
- positive
  Under coupled water and nitrogen supply at the reported rates, sugar beet sugar content was highest.
Effect of nitrogen and boron fertilization on the productivity and quality of sugar beet · 2023
- positive
  Applying 80 or 100 kg N/fed. with 240 ppm boron gave the highest root diameter, root yield and recoverable sugar yield.
cites 1 paper here
Sugar Beet Growth, Yield, and Quality in Relation to Nitrogen Levels and Yeast Addition Times · 2023
- positive
  Fertilizing with 69 kg nitrogen per fad gave the greatest total soluble solids, sucrose and apparent juice purity in sugar beet.
- positive
  Fertilizing with 92 kg N per fad gave the peak gross white sugar yield per fad in sugar beet.
- positive
  Fertilizing with 69 kg nitrogen per fad gave the greatest extractable white sugar percentages and sugar yield per fad in sugar beet.
cites 1 paper here
Deficit irrigation combined with nitrogen application in the early growth stage of sugar beet increases the production capacity of canopy and avoids yield loss · 2023
- positive
  The treatment increased sugar yield by 57.6%.
The Effects of Nitrogen and Boron on the Yield and Biochemical Traits of Sugar Beets (Beta vulgaris L.) · 2024
- positive
  Greater nitrogen and boron application increased pure sugar yield.
- positive
  Greater nitrogen and boron application increased sugar content.
cites 1 paper here
Optimization of Irrigation Amount and Nitrogen Rate of Drip-Fertigated Sugar Beet Based on Sugar Yield, Nitrogen Use Efficiency, and Critical Nitrogen Dilution Curve in the Arid Southern Xinjiang of China · 2025
- positive
  Sugar yield increased then generally stabilized as N rate rose.
Agricultural Operations as Root- knot Nematode Pest Management Strategy on Sugarbeet. 2- Utilizing Different Rates of Nitrogen and Potassium Fertilizers in Semi-Arid Land · 2025
- positive
  High fertilizer rates significantly improved raw sucrose content, returned sugar content and quality index.
- positive
  High fertilizer rates significantly improved loss sugar yield per feddan.
Effects of nitrogen management on yield, sugar content and nitrogen use efficiency in rainfed and irrigated sugar beet in China: A meta-analysis · 2026
- positive
  N application significantly increased sugar yield by 23.3%.
- negative
  N application reduced sugar content slightly by 4.5%, not significant (p >0.05).

Papers reporting a negative result or no effect 37

The response of sugar beet to fertilizer and the effect of farmyard manure · 1962
- negative
  Nitrogen above the optimum reduced sugar yield.
  compared with optimum nitrogen dressing
Responses of the Sugar Beet to Low Soil Moisture at Two Levels of Nitrogen Nutrition¹ · 1963
- negative
  Nitrogen deficiency increased sucrose yield.
  About lacking this nutrient, so it counts the other way round
Studies on Growing Behavior of Sugar Beet Plant in the Warmer Districts of Japan : II. Effect of nitrogen fertilizer on growing behavior · 1963
- no effect
  Seasonal patterns of reducing sugar, raffinose and ash in roots did not principally differ across nitrogen levels.
Sodium and potassium relationships in sugar beet · 1970
- negative
  A larger nitrogen dressing decreased sugar beet sugar yield.
Effects of nitrogen fertilizer, plant population and irrigation on sugar beet: I. Yields · 1971
- no effect
  More nitrogen changed sugar yield little in any year.
cited by 1 paper here
Effects of shading and of seasonal differences in weather on the growth, sugar content and sugar yield of sugar‐beet crops · 1972
- negative
  Irrigation and additional nitrogen decreased root sugar content as percentage of fresh weight only by altering water content.
Some effects, especially on yield, of artificially defoliating sugar beet · 1972
- negative
  Without nitrogen, sugar content was usually greater than with nitrogen.
  compared with with nitrogenAbout lacking this nutrient, so it counts the other way round
The effect of time of sowing and harvesting on growth, yield and nitrogen fertilizer requirement of sugar beet · 1973
- no effect
  In every experiment, nitrogen above 75 kg N/ha did not significantly increase or decrease sugar yield.
The effect of nematicides, applied to the seed rows in spring, on growth and yield of sugar beet in Docking‐disorder‐affected fields · 1974
- no effect
  Nitrogen top-dressing never significantly affected sugar yield.
Effect of N Fertilization on Sugarbeet Crown Tissue Production and Processing Quality¹ · 1978
- negative
  At higher nitrogen levels, sucrose content in root and crown tissue decreased.
cited by 1 paper here
Influence of Nitrogen Fertility Level and Topping Method on Yield, Quality, and Storage Losses in Sugarbeets¹ · 1979
- negative
  N application from 0 to 269 kg/ha decreased sucrose content by 1.42 units.
- no effect
  N application rate did not significantly affect total sucrose yield.
Veränderungen des bodenbürtigen Mineralstickstoffs im Frühjahr und seine Bedeutung für die Bemessung der N‐Düngung von Zuckerrüben · 1986
- no effect
  Nitrogen deviations below 50 kg N/ha from optimum did not significantly change sugar yield.
  compared with optimal N amount
EFFECT OF DIFFERENT LEVELS OF NITROGEN ON THE YIELD, NUTRIENT UPTAKE AND QUALITY COMPONENTS IN JUICE OF SUGARBEET (Beta vulgaris L.) · 1991
- negative
  Increasing nitrogen doses adversely affected sucrose content.
EFFECT OF SOWING DATE, IRRIGATION INTERVAL AND NITROGEN FERTILIZATION ON YEILD AND QUALITY OF SUGAR BEET UNDER UPPER EGYPT CONDITIONS · 1998
- no effect
  Increasing nitrogen level did not significantly increase sugar yield in either season.
Study on the effect of yield and quality in sugarbeet with different nitrogen amount applied · 2000
- negative
  Excessive nitrogen reduced sugar yield.
EFFECT OF PLANTING DATES, NITROGEN LEVELS AND BIOFERTILIZA TION TREATMENTS: 2: YIELD, YIELD COMPONENTS AND QUALITY OF SUGAR BEET (Beta vulgaris, L.) · 2002
- negative
  Unfertilized controls had the highest TSS, sucrose and purity values.
  About lacking this nutrient, so it counts the other way round
EFFECT OF SOME AGRI-PRACTICES ON THE VEGETATIVE GROWTH AND CHEMICAL CONSTITUENTS OF SUGAR BEET · 2004
- negative
  Increasing nitrogen rates negatively affected total soluble solids (TSS %) of sugar beet.
The effect of nitrogen fertilization and anti-fungal plant protection on sugar beet yielding · 2005
- negative
  Doubling nitrogen from 90 to 180 kg N/ha lowered sugar content.
  compared with 90
- negative
  Increasing N from 90 to 180 kg N/ha lowered sugar content.
  compared with 90
cited by 1 paper here
Influence of some cultural practices on quantitative traits of sugar beet in multi-year trials and commercial production · 2007
- negative
  Nitrogen above 50 kgha-1 decreased sugar yield.
- negative
  Nitrogen above 50 kgha-1 reduced sugar content.
EFFECT OF PLOUGHING DEPTH AND NITROGEN FERTILIZATION ON SOME QUALITY PARAMETERS OF SUGAR BEET UNDER FAYOUM GOVERNORATE CONDITIONS · 2007
- no effect
  Nitrogen source did not significantly affect sugar beet root soluble solids, sucrose, purity, nitrogen, sodium, or potassium in either season.
Influence of fertilization and nitrate-nitrogen position in soil profile on the sugar beet root yield and quality · 2008
- negative
  Increasing nitrogen reduced refined sugar yield.
Effect of nitrogen application on accumulation and distribution of dry matter and yield and quality of high-yielding sugar beet · 2008
- negative
  Increasing nitrogen supply significantly decreased the root cap ratio and the sugar content of harvest.
EFFECT OF NITROGEN RATES AND ITS TIME OF APPLICATION ON PRODUCTIVITY OF SUGAR BEET UNDER SPRINKLE IRRIGATION IN NEWLY RECLAIMED SOILS · 2009
- no effect
  Further nitrogen above 120 kg/fed had no significant effect on sugar yield.
  compared with 120 kg N/fedNo difference from an alternative treatment
- negative
  Excessive nitrogen lowered sugar beet sucrose content, juice purity and extractable sucrose.
cites 1 paper here
Influence of Planting Density and Nitrogen Dose on Root and Sugar Yeild of Beet (Beta vulgaris L.) Under Sub-tropical Semi-Arid Conditions of Punjab · 2010
- no effect
  Root sucrose content did not differ statistically across densities and nitrogen levels.
- no effect
  Farmyard manure with 90 kg N gave similar root and sugar yield to 120 kg N alone.
  compared with 120 kg N ha−1 aloneNo difference from an alternative treatment
EFFECT OF NITROGEN FERTILIZATION AND HARVESTING DATES ON SUGAR BEET PRODUCTIVITY AND QUALITY IN NEWLY RECLAIMED SANDY SOILS · 2013
- negative
  Increasing nitrogen reduced total soluble solids, sucrose and purity percentages.
cited by 1 paper here
Response of a Two-Year Sugar Beet-Sweet Sorghum Rotation to an Agronomic Management Approach Diversified by Soil Tillage and Nitrogen Fertilisation · 2014
- negative
  Unfertilized sugar beet had lower sucrose yield.
  compared with fertilised treatments
NITROGEN FERTILIZATION AND ITS EFFECT ON SPREAD OF CERCOSPORA BETICOLA AS WELL AS THE YIELD AND QUALITY OF SIX SUGAR BEET VARIETIES UNDER NATURAL CONDITION · 2015
- no effect
  The studied nitrogen levels did not affect the percentages of TSS, sucrose and purity.
Effect of Plant Population and Distribution and Nitrogen Levels on Yield and Quality of Sugar Beet · 2017
- negative
  Increasing nitrogen decreased sucrose, TSS and purity percentages in both years.
cited by 2 papers here
Nitrogen Fertilizer Optimization for Sugarbeet in the Red River Valley of North Dakota and Minnesota · 2018
- negative
  The highest nitrogen rate reduced sugar concentration in 2016.
cited by 3 papers here
THE INFLUENCE OF MINERAL FERTILIZERS ON THE SYNTHESIS OF SUGARS IN THE SUGAR BEET (BETA VULGARIS L. VAR. SACCHARIFERA) · 2018
- negative
  Increasing nitrogen dose reduced sugar content in the thickened sugar beet root.
Effect of the Nitrogen Rate and Weed Control Treatments on the Quantitative and Qualitative Yield of Sugar Beet · 2019
- no effect
  Nitrogen amount did not affect sugar content in molasses.
cited by 1 paper here
The Effect of Growth Activators and Plant Growth-Promoting Rhizobacteria (PGPR) on the Soil Properties, Root Yield, and Technological Quality of Sugar Beet · 2020
- no effect
  A 30% reduction of mineral nitrogen was possible without a decrease in biological and pure sugar yield.
  compared with full nitrogen mineral fertilizationNo difference from an alternative treatment
cited by 1 paper here
Interactive Effects of Gibberellic Acid and Nitrogen Fertilization on the Growth, Yield, and Quality of Sugar Beet · 2021
- negative
  Foliar application of GA3 and N-fertilizers significantly decreased sucrose and total soluble solid (TSS) percentages of sugar beet.
cites 8 papers here
Sugarbeet response to interactions between fall‐seeded cover crop and fertilizer nitrogen application time · 2022
- no effect
  Cover crop and nitrogen treatments did not affect sugar concentration.
Growth and Quality of Sugar Beet and Its Relationship to Sowing Method, Nitrogen and Boron Fertilization · 2022
- negative
  Increasing nitrogen from 75 to 90, 105 and 120 kg N/fed significantly decreased root yield, sugar yield and quality.
  compared with 75
Optimization of nitrogen nutrition in increasing the productivity of sugar beet · 2022
- negative
  Increasing the spring nitrogen dose above 90 kg/ha reduced sugar content in roots.
cites 1 paper here
Effect of nitrogen and boron treatments on harvest index and nitrogen use efficiency in sugar beet · 2023
- negative
  Nitrogen physiological efficiency in sugar yield decreased as nitrogen dose rose.
cites 1 paper here

A paper is on the positive side when any of its claims here is positive. Claims are grouped by organism, treatment and what was measured or targeted. Claims that compare genotypes are left out; a claim about lacking a nutrient counts the other way round in that nutrient’s question. “Results differ” marks a question where two model reviewers, reading both claims, accepted at least one pair of papers whose results differ.

nitrogen · Quality: sugar starch · Beta vulgaris (beet)

Papers whose results differ, checked claim by claim 1

How these papers cite each other

Papers reporting a positive result 66

Papers reporting a negative result or no effect 37

nitrogen on Beta vulgaris (beet) against other targets

nitrogen · quality: sugar starch on other organisms