Abstract
Abstract Soil and leaf analyses were made in connection with six field experiments involving orange trees fertilized with potassium and/or magnesium. Experimental plots were located in 6 orchards in 4 southern California counties. The concentration of magnesium in spring‐cycle leaves was correlated with the degree of leaf symptoms characteristic of magnesium deficiency. Addition of magnesium fertilizer resulted in a marked increase in leaf magnesium and a disappearance of deficiency symptoms. Potassium fertilization accentuated magnesium deficiency. Deficiency symptoms were associated with leaf magnesium concentrations of 0.20% or less. The ratio of exchangeable K/Mg in the soil (particularly the 18‐ to 30‐inch depth) was highly correlated with the percent magnesium in the leaves.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 6
Claim · model-written summary
Spring-cycle leaf magnesium concentration correlated with magnesium deficiency symptoms.
- Organ / stage
- spring‐cycle leavese0
- Outcome
- degree of leaf symptoms characteristic of magnesium deficiencye0
CitrusNot reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The concentration of magnesium in spring‐cycle leaves was correlated with the degree of leaf symptoms characteristic of magnesium deficiency.”
t0“Citrus”
Claim · model-written summary
Magnesium fertilizer markedly increased leaf magnesium.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Addition of magnesium fertilizer resulted in a marked increase in leaf magnesium”
t0“Citrus”
Claim · model-written summary
Magnesium fertilizer caused deficiency symptoms to disappear.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Addition of magnesium fertilizer resulted in a marked increase in leaf magnesium and a disappearance of deficiency symptoms.”
t0“Citrus”
Claim · model-written summary
Potassium fertilization accentuated magnesium deficiency.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Potassium fertilization accentuated magnesium deficiency.”
t0“Citrus”
Claim · model-written summary
Deficiency symptoms were associated with leaf magnesium at or below 0.20%.
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Deficiency symptoms were associated with leaf magnesium concentrations of 0.20% or less.”
t0“Citrus”
Claim · model-written summary
Soil exchangeable K/Mg ratio was highly correlated with leaf magnesium percentage.
- Outcome
- percent magnesium in the leavese0
- Qualifier
- particularly the 18‐ to 30‐inch depthe0
- Setting
- soile0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The ratio of exchangeable K/Mg in the soil (particularly the 18‐ to 30‐inch depth) was highly correlated with the percent magnesium in the leaves.”
t0“Citrus”
The same questions in other papers
magnesium atom · disease · CitrusResults agree
1 paper in the same direction as this paper
- positive
magnesium atom · nutrient: content · CitrusResults agree
2 papers in the same direction as this paper
- positive
- positive
fertilization · disease · CitrusPositive and negative results
6 papers in the same direction as this paper · 1 in the opposite direction
- negative
- positive
- positive
4 papers more in this group
See all 8 papers →fertilization · nutrient: content · CitrusPositive and negative results
27 papers in the same direction as this paper · 4 in the opposite direction
- no effect
- negative
- no effect
28 papers more in this group
See all 32 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.