nitrogen · Nutrient: content · Citrus sinensis (sweet orange)
16 claims from these papers; 1 citation between them.
Papers whose results differ, checked claim by claim 2
2 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.
- Winter Application of Low-biuret Urea to the Foliage of `Washington' Navel Orange Increased Yield (1994)
no changeAnnual winter foliar urea did not significantly increase leaf total nitrogen after three years.
EFFECT OF FOLIAR APPLICATION WITH UREA ON FLOWERING, RUITING AND LEAF NITROGEN CONTENT OF VALENCIA ORANGE TREES. (2009)increaseWinter urea spray increased leaf nitrogen.
The records name no dose, test system or situation that separates the two claims.Compare the two papers → - Winter Application of Low-biuret Urea to the Foliage of `Washington' Navel Orange Increased Yield (1994)
no changeAnnual winter foliar urea did not significantly increase leaf total nitrogen after three years.
N and K Fertilization Effects on Leaf Analysis, Tree Size, and Yield of Three Major Florida Orange Cultivars1 (1975)increaseIncreased nitrogen application raised orange leaf nitrogen and magnesium content.
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: 0 on the same side, 1 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 8
- positive
- positive
- negative
- positive
- positive
- positive
- positive
- positive
- positive
Compost-nitrogen synergies improve nutrition and growth in citrus rootstocks · 2025
- positive
- negative
Papers reporting a negative result or no effect 4
Winter Application of Low-biuret Urea to the Foliage of `Washington' Navel Orange Increased Yield · 1994
- no effect
By-product Iron-humate Increases Tree Growth and Fruit Production of Orange and Grapefruit · 1998
- no effect
366 Nitrogen Fertigation of Young Navel Orange Trees · 2000
- no effect
- no effect
- no effect
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.