potassium · Yield · Sorghum

Results differ41 papers: 24 positive, 17 negative or no effect · 8 pairs of papers confirmed to differ

57 claims from these papers; 1 citation between them.

Papers whose results differ, checked claim by claim 8

8 pairs 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.

NPK requirement of hybrid jowar (CSH-1) in kharif season under rainfed condition (1976)
no changeK application did not significantly affect sorghum yield.
Response of Rabi Sorghum Varieties to Potassium Levels in Inceptisol under Dryland Condition (2012)
increasePotassium increased sorghum grain and stover yields compared with check plots.
The records name no dose, test system or situation that separates the two claims.Compare the two papers →
Rationalising fertilizer rates for sorghum. II. Optimising the dose with relevance to the soil test values (1980)
no changeK had no significant effect on sorghum grain yield.
EFFECT OF IRRIGATION INTERVALS AND POTASSIUM FERTILIZER RATES ON YIELD AND SEED QUALiTY OF SOME SORGHUM CULTIVARS (2008)
increasePotassium at 48 Kg K2O/feddan increased grain yield by 15.31% in 2005 relative to unfertilized plants.
The records name no dose, test system or situation that separates the two claims.Compare the two papers →
EFFECT OF IRRIGATION INTERVALS AND POTASSIUM FERTILIZER RATES ON YIELD AND SEED QUALiTY OF SOME SORGHUM CULTIVARS (2008)
increasePotassium at 48 Kg K2O/feddan increased grain yield by 15.31% in 2005 relative to unfertilized plants.
Irrigated Grain Sorghum Response to Long-Term Nitrogen, Phosphorus, and Potassium Fertilization (2021)
no changePotassium application had no effect on sorghum yield during the study.
The records name no dose, test system or situation that separates the two claims.Compare the two papers →
EFFECT OF IRRIGATION INTERVALS AND POTASSIUM FERTILIZER RATES ON YIELD AND SEED QUALiTY OF SOME SORGHUM CULTIVARS (2008)
increasePotassium at 48 Kg K2O/feddan increased grain yield by 15.31% in 2005 relative to unfertilized plants.
Long-Term Nitrogen, Phosphorus, and Potassium Fertilization of Irrigated Grain Sorghum (2020)
no changePotassium fertilization had no effect on sorghum yield.
The records name no dose, test system or situation that separates the two claims.Compare the two papers →
EFFECT OF IRRIGATION INTERVALS AND POTASSIUM FERTILIZER RATES ON YIELD AND SEED QUALiTY OF SOME SORGHUM CULTIVARS (2008)
increasePotassium at 48 Kg K2O/feddan increased grain yield by 15.31% in 2005 relative to unfertilized plants.
Long-Term Nitrogen, Phosphorus, and Potassium Fertilization of Irrigated Grain Sorghum (2020)
no changeK application had no effect on sorghum yield across the study.
The records name no dose, test system or situation that separates the two claims.Compare the two papers →
EFFECT OF IRRIGATION INTERVALS AND POTASSIUM FERTILIZER RATES ON YIELD AND SEED QUALiTY OF SOME SORGHUM CULTIVARS (2008)
increasePotassium at 48 Kg K2O/feddan increased grain yield by 15.31% in 2005 relative to unfertilized plants.
Nitrogen and Phosphorus Fertilization of Irrigated Grain Sorghum (2016)
no changePotassium application did not affect sorghum yield during the study.
The records name no dose, test system or situation that separates the two claims.Compare the two papers →

Show 2 more pairs

EFFECT OF IRRIGATION INTERVALS AND POTASSIUM FERTILIZER RATES ON YIELD AND SEED QUALiTY OF SOME SORGHUM CULTIVARS (2008)
increasePotassium at 48 Kg K2O/feddan increased grain yield by 15.31% in 2005 relative to unfertilized plants.
Methods of increasing grain sorghum production in the Markham valley (1972)
no changePotassium did not increase sorghum grain yield.
The records name no dose, test system or situation that separates the two claims.Compare the two papers →
NPK requirement of hybrid jowar (CSH-1) in kharif season under rainfed condition (1976)
no changeK application did not significantly affect sorghum yield.
EFFECT OF IRRIGATION INTERVALS AND POTASSIUM FERTILIZER RATES ON YIELD AND SEED QUALiTY OF SOME SORGHUM CULTIVARS (2008)
increasePotassium at 48 Kg K2O/feddan increased grain yield by 15.31% in 2005 relative to unfertilized plants.
The records name no dose, test system or situation that separates the two claims.Compare the two papers →

How these papers cite each other

1 citation between these papers: 1 on the same side, 0 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 24

Preliminary results of a two-year sorghum trial, on a grumusol, Waigani, Papua New Guinea. · 1971
- positive
  Adding 80 kg K/ha to 110 kg N/ha raised sorghum panicle weight to 28.8 g.
  compared with 110 kg N/ha alone
Effect of depth on availability of soil phosphorus as measured by various extractants, and their relationship to the yield of sorghum · 1974
- positive
  Application of 160 kg N + 120 kg P2O5 + 60 kg K2O/ha gave the highest sorghum yields among the 17 fertilizer combinations
  compared with 17 combinations
Note on the effect of levels of nitrogen, phosphorus and potassium on hybrid sorghum in Bundelkhand region · 1976
- positive
  Applying 60 kg K2O/ha gave the highest sorghum grain yield, 2.57 t/ha, versus 1.94 t in the potassium control.
  compared with respective control treatments
Fertilizer response of cold-tolerant sorghums under semi-arid high-altitude conditions. · 1978
- positive
  K positively influenced yield in two experiments.
Growth and yield of sorghum as influenced by green manure and soil organic matter content. · 1980
- positive
  Inorganic fertilizer increased plant height, leaf area index and panicle length.
- positive
  Inorganic fertilizer increased panicle weight and grain yield, the latter to 2.24 t/ha.
Response of sorghum (Sorghum bicolor L. Moench) hybrid CSH-1 and variety M.35-1 to different levels of N, P and K in rabi under irrigation (III): dry matter accumulation pattern · 1981
- positive
  K significantly increased dry matter only in sorghum panicles and grain.
Effect of P and K on Yield and Chemical Composition of Forage Sorghum¹ · 1983
- positive
  Potassium increased yield only in dry years when P was applied.
- negative
  Increasing K without P decreased yields.
  compared with no P was applied
cited by 1 paper here
EFFECT OF LONG-TERM APPLICATION OF MANURES AND FERTILIZERS ON CHANGES IN THE WEED SPECIES IN THE 138TH CROPPING UNDER RAINFED CONDITIONS · 2001
- positive
  Balanced NPK fertilizer produced 391% relative grain yield over control.
  compared with control
Effect of irrigation and crop residue management on crop and soil productivity under soybean-sorghum cropping system · 2002
- positive
  Sugarcane trash with NPK fertilizer gave the highest sorghum grain and fodder yields.
EFFECT OF IRRIGATION INTERVALS AND POTASSIUM FERTILIZER RATES ON YIELD AND SEED QUALiTY OF SOME SORGHUM CULTIVARS · 2008
- positive
  Potassium at 48 Kg K2O/feddan increased grain yield by 15.31% in 2005 relative to unfertilized plants.
  compared with unfertilized plants
- positive
  Potassium at 48 Kg K2O/feddan increased grain yield by 15.32% in 2006 relative to unfertilized plants.
  compared with unfertilized plants
Evaluation of Grain Growth of Corn and Sorghum under K2O Application and Irrigation According · 2009
- positive
  Potassium application lessened drought damage and enabled grain growth under drought in sorghum.
  compared with non-potassium applications
EFFECT OF ZINC NUTRITION ON GROWTH, YIELD, AND QUALITY OF FORAGE SORGHUM IN RESPECT WITH INCREASING POTASSIUM APPLICATION RATES · 2010
- positive
  The combined treatment increased dry matter yield by 36–38%.
  compared with comparable K level applied without zinc
- positive
  The combined treatment increased fresh matter yield by 25%.
  compared with comparable K level applied without zinc
NITROGEN, PHOSPHORUS, AND POTASSIUM EFFECTS ON GRAIN SORGHUM PRODUCTION AND STALK ROT FOLLOWING ALFALFA AND BIRDSFOOT TREFOIL · 2011
- positive
  Low potassium rates increased sorghum yield.
cites 1 paper here
Response of Rabi Sorghum Varieties to Potassium Levels in Inceptisol under Dryland Condition · 2012
- positive
  The 50 kg K2O rate gave significantly higher soil available potassium at harvest.
- positive
  The 25 kg K2O rate gave higher gross and net returns and benefit cost ratio.
- positive
  Potassium increased soil available potassium at harvest compared with check plots.
  compared with check plots
- positive
  The 25 kg K2O rate gave higher grain and stover yields.
- positive
  Potassium increased sorghum grain and stover yields compared with check plots.
  compared with check plots
On-farm response of groundnut (Arachis hypogaeaL.)-sorghum (Sorghum bicolorL.) cropping system to fertilizers NPK+ FeSO₄/ZnSO₄input · 2015
- positive
  Recommended fertilizers increased sorghum grain and stover yields.
Balanced Fertilization for Maximizing the Yield And Quality of Sugarcane Crop in Periyar Vaigai Command Area · 2015
- positive
  Sorghum dry matter yield responded well to N, P, K, Zn and Fe in greenhouse study.
Impact Assessment of ‘Bhoochetana’ – A Soil Test-Based Nutrient Management Scaling-Out Initiative in Karnataka · 2017
- positive
  Sorghum yield increased by 11% under IP
  compared with farmer practice (FP)
Yield and Economics of Rabi Sorghum [Sorghum bicolor (L.) Moench] as Influenced by Different Drip Irrigation Regimes and Fertigation Levels · 2018
- positive
  The 100% RD fertigation treatment had a higher B:C ratio than 75% RD.
  compared with 75% RD N and K2O
- positive
  The 100% RD fertigation treatment had a higher B:C ratio than 125% RD.
  compared with 125% RD N and K2O
RESPONSE OF SEVERAL SORGHUM VARIETIES TO POTASSIUM FOLIAR. · 2018
- positive
  The 1000mg L-1 potassium treatment was superior for height, leaf area and grain yield in both seasons.
EFFECT OF ORGANIC AND MINERAL FERTILIZERS ON YIELD AND QUALITY OF SORGHUM UNDER SANDY SOIL CONDITIONS · 2021
- positive
  100 % N with potassium silicate gave the highest 1000-grain weight of sorghum
  compared with 100 % N without spray
- positive
  75 % N with potassium silicate gave the highest grain yield (22.55 ardab / fed) in sorghum
- positive
  75 % N with potassium silicate gave the highest grain weight per head in sorghum
- positive
  100 % N with potassium silicate gave the highest green yield (12.40 ton / fed) of sorghum
  compared with 100 % N without spray
Restoration of rainwater techniques and fertilizer split application methods on yield and total nutrient uptake of rainfed sorghum under vertisols (Typic haplusterts) · 2022
- positive
  The specified fertilizer split gave higher grain yield of 1734 kg/ha.
Response of integrated nitrogen management on nutrient content-uptake and economics in kharif sorghum · 2024
- positive
  Application of RDF (80:40:00 kg N:P2O5:K2O/ha) gave a higher benefit-cost ratio of 4.79 in sorghum.
Impact of Biofertilizers on Yield and Economics of Rabi Sorghum (Sorghum bicolor L.) under Rainfed Condition · 2024
- positive
  Gross returns were significantly higher at Rs.102133/ha.
  compared with rest of the treatments
- positive
  The combined treatment produced significantly higher sorghum grain yield of 42.3 q/ha.
  compared with rest of the treatments
- positive
  The combined treatment produced significantly higher fodder yield of 8.4 t/ha.
  compared with rest of the treatments
- positive
  Net returns were significantly higher at Rs.68232/ha.
  compared with rest of the treatments
Influence of real time nitrogen management and optimisation of phosphorus and potassium on productivity of grain sorghum in South Odisha · 2026
- positive
  SPAD-based sufficiency index <95% combined with higher phosphorus and potassium levels produced the highest yields.
- positive
  Applying 125% of the recommended phosphorus and potassium dose gave significantly higher growth and yield parameters than lower levels.
  compared with lower levels

Papers reporting a negative result or no effect 17

Response of hybrid sorghum (Sorghum vulgare Pers.) to N, P and K fertilization under rainfed condition. · 1970
- no effect
  Potassium application at 25-50 kg K2O/ha increased grain yield of hybrid sorghum CSH-1 compared with no P or K, not significantly.
  compared with plots given no P or K
Methods of increasing grain sorghum production in the Markham valley · 1972
- no effect
  Potassium did not increase sorghum grain yield.
NPK requirement of hybrid jowar (CSH-1) in kharif season under rainfed condition · 1976
- no effect
  K application did not significantly affect sorghum yield.
Rationalising fertilizer rates for sorghum. II. Optimising the dose with relevance to the soil test values · 1980
- no effect
  K had no significant effect on sorghum grain yield.
INFLUENCE OF POTASSIUM AND MAGNESIUM CONCENTRATIONS IN NUTRIENT CULTURE ON GROWTH AND COMPOSITION OF SORGHUM (SORGHUM BICOLOR (L.) MOENCH) PLANTS · 1980
- no effect
  Yield responded to applied K only from 50 days after seedling emergence.
Nutrient optimization strategy for rice by eliminating surprise nutrient deficiencies · 2001
- negative
  Excluding N, P, K and Zn significantly reduced sorghum dry matter yield.
Potassium Management for Brown Midrib Sorghum × Sudangrass as Replacement for Corn Silage in the North‐eastern USA · 2005
- no effect
  Potassium application did not affect dry matter yields in either year.
Nitrogen and Phosphorus Fertilization of Irrigated Grain Sorghum · 2015
- no effect
  Potassium application had no effect on sorghum yield over the study period.
Long-Term Nitrogen and Phosphorus Fertilization of Irrigated Grain Sorghum · 2016
- no effect
  Potassium application had no effect on sorghum yield over the study period.
Nitrogen and Phosphorus Fertilization of Irrigated Grain Sorghum · 2016
- no effect
  Potassium application did not affect sorghum yield during the study.
Irrigated Grain Sorghum Response to Long-Term Nitrogen and Phosphorus Fertilization · 2017
- no effect
  Potassium application had no effect on sorghum yield throughout the study.
Long-Term Nitrogen and Phosphorus Fertilization of Irrigated Grain Sorghum · 2017
- no effect
  Potassium application had no effect on sorghum yield over the study period.
Long-Term Nitrogen, Phosphorus, and Potassium Fertilization of Irrigated Grain Sorghum · 2020
- no effect
  Potassium fertilization had no effect on sorghum yield.
Long-Term Nitrogen, Phosphorus, and Potassium Fertilization of Irrigated Grain Sorghum · 2020
- no effect
  K application had no effect on sorghum yield across the study.
Irrigated Grain Sorghum Response to Long-Term Nitrogen, Phosphorus, and Potassium Fertilization · 2021
- no effect
  Potassium application had no effect on sorghum yield during the study.
Potassium, Zinc, and Boron Nutrients Effect on Sorghum (Sorghum bicolor L. Moench) Yield in Wag-Lasta, Northern, Ethiopia · 2024
- no effect
  Application of potassium, zinc and boron had no significant effect on sorghum yield and yield components at all sites.
  compared with NPSNo difference from an alternative treatment
Effects of nutrient omission and landscape positions on grain sorghum production in northern Ethiopia · 2025
- no effect
  Omitting potassium did not significantly affect grain and biomass yields.
  About lacking this nutrient, so it counts the other way round

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.

potassium · Yield · Sorghum

Papers whose results differ, checked claim by claim 8

How these papers cite each other

Papers reporting a positive result 24

Papers reporting a negative result or no effect 17

potassium on Sorghum against other targets

potassium · yield on other organisms