Intervention effectmodel-written summary

Fertilizer N did not influence soil pH, microaggregation, organic C, or extractable nutrients.

A claim from Sorghum Stover Removal Effects on Soil Organic Matter content, Extractable Nutrients, and Crop Yield · 1992

Intervention effectobservedoriginal resultno effectmeasured

Claim · model-written summary

Fertilizer N did not influence soil pH, microaggregation, organic C, or extractable nutrients.

Taxon
sorghumSorghume0
Treatment
fertilizer N additione0
Outcome
soil pH, microaggregation, organic C, or extractable nutrientse0
Direction
Neithere0

Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleComparatorSettingValueQualifier

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

Sorghum
Sorghum · Taxon · picture of the genus (one of its species)Evelyn Simak · CC BY-SA 2.0 · Wikimedia Commons ↗

Verbatim

e0

“Neither sorghum cultivar nor fertilizer N addition influenced soil pH, microaggregation, organic C, or extractable nutrients in this fine-textured Vertisol.”

✓ located verbatim in the source · abstract, characters 409–565

Title

Sorghum Stover Removal Effects on Soil Organic Matter content, Extractable Nutrients, and Crop Yield

J. M. Powell; F. M. Hons Journal of Sustainable Agriculture 1992. doi:10.1300/j064v02n01_04

Other claims from this paper (8)

Record rev-e7e210b3d66f08b03fa330dac975661e55916f918013d3449dbf411d6e7b1191 · schema claims-v0.9 · position 2 in the model’s answer

nitrogen · nutrient: content · SorghumPositive and negative results

52 papers: 46 positive, 6 negative or no effect

5 papers in the same direction as this claim · 46 in the opposite direction

  1. positive
    Nitrate promoted cadmium concentrations in leaves, stems and roots relative to ammonium.

    Nitrate Increases Cadmium Accumulation in Sweet Sorghum for Improving Phytoextraction Efficiency Rather Than Ammonium · 2021 · compared with ammonium

    Opposite direction

  2. positive
    The 120 kg N ha −1 rate increased plant nitrogen and phosphorus content compared with lower rates.

    Effects of nitrogen fertilization and drought on hydrocyanic acid accumulation and morpho‐physiological parameters of sorghums · 2020 · compared with 90 and 60 kg N ha −1

    Opposite direction

  3. positive
    Optimum nitrate supply enhanced aboveground cadmium accumulation in sweet sorghum.

    Enhancement of cadmium accumulation in sweet sorghum as affected by nitrate · 2020

    Opposite direction

  4. positive
    Nitrogen application increased nitrogen uptake by sorghum and the whole cropping system.

    Sorghum-Legume Intercropping and the Effects of Nitrogen Fertilization. I. Yield and Nitrogen Uptake by Crops · 1984

    Opposite direction

  5. positive
    The highest nitrogen and phosphorus rates produced the highest sorghum forage and grain nitrogen contents.

    Nitrogen fixation associated with roots of sorghum and wheat · 1980

    Opposite direction

  6. positive
    Absolute plant N contents of sorghum were greater in the high soil N treatment.

    Patterns of nitrogen mobilization in grain sorghum hybrids and the relationship to grain and dry matter production1 · 1992 · compared with low soil N treatment

    Opposite direction

  7. positive
    Nitrate or urea alone generally produced the highest calcium concentration, followed by mixed nitrate and ammonium, then ammonium alone.

    Calcium Deficiency in Sorghum Grown in Controlled Environments in Relation to Nitrate/Ammonium Ratio and Nitrogen Source · 1988 · compared with NH + 4 only

    Opposite direction

  8. positive
    Leaf nitrogen increased with increasing nitrogen rate and more frequent irrigation.

    Effects of Irrigation Interval, Urea and Gypsum on N, P and K Uptake by Forage Sorghum on Highly Saline–Sodic Clay · 1982

    Opposite direction

43 papers more in this group

See all 52 papers →

fertilization · nutrient: content · SorghumPositive and negative results

118 papers: 111 positive, 7 negative or no effect

6 papers in the same direction as this claim · 111 in the opposite direction

  1. positive
    Compost increased total nitrogen recovery to 16.5% compared with 10.9%.

    Nitrogen retention and plant uptake on a highly weathered central Amazonian Ferralsol amended with compost and charcoal · 2008 · compared with only mineral‐fertilized plots

    Opposite direction

  2. positive
    Manure increased sorghum nitrogen uptake by 21%–36%.

    Effects of Farmyard Manure and Inorganic Fertilizers on Sorghum Growth, Yield, and Nitrogen Use in a Semi-Arid Area of Ethiopia · 2006

    Opposite direction

  3. positive
    Biomass incorporation with fertilizer built up soil nutrients relative to fallow.

    Effects of long‐term legume cover crop incorporation on soil organic carbon, microbial biomass, nutrient build‐up and grain yields of sorghum/sunflower under rain‐fed conditions · 2007 · compared with fallow plots

    Opposite direction

  4. positive
    Compost increased uptake of measured nutrients except manganese.

    Pelletized Municipal Refuse Compost as a Soil Amendment and Nutrient Source for Sorghum · 1973

    Opposite direction

  5. positive
    Combined fertilizer N and organic manure increased organic carbon and available N.

    Effect of integrated use of organic manure, green manure and fertilizer nitrogen on sustaining productivity of Rabi sorghum-chickpea system and fertility of a vertisol · 2003 · compared with fertilizer N alone

    Opposite direction

  6. positive
    applications of manure increased plant nitrate content.

    Nitrate Accumulation in Some Iowa Crop Plants1 · 1958

    Opposite direction

  7. positive
    100% NPK plus FYM produced the highest increase in soil organic carbon and total nitrogen.

    Long-term effect of fertilization on soil chemical and biological characteristics and productivity under sorghum (Sorghum bicolor)- wheat (Triticum aestivum) system in Vertisol · 2011

    Opposite direction

  8. positive
    Nitrogen uptake increased with N fertilizer application.

    Nitrogen application effects on forage sorghum production and nitrate concentration · 2019

    Opposite direction

109 papers more in this group

See all 118 papers →

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.