Abstract
Abstract Potassium (K), magnesium (Mg), and sulfur (S) are susceptible to leaching in Southeastern Coastal Plain soils and can limit crop production if not properly managed. This study aimed to determine the effect of K, Mg, and S fertilization on soybean [ Glycine max (L.) Merr.] yield, tissue nutrient concentrations, and soil K, Mg, and S concentrations. Treatments included three K, two Mg, and two S fertilizer rates arranged in a randomized complete block design with three replications. There was no significant main or interaction effect of K, Mg, and S on soybean yield, even when the initial soil‐test S level was below critical levels. Leaf K concentrations of control plots measured at the R2 growth stage were in the sufficiency range reported for soybean in southeastern states. However, leaf Mg and S concentrations were below the sufficiency ranges. Applying S fertilizer increased leaf Mg and S concentrations, but Mg fertilizer did not affect leaf Mg concentrations. Applying K fertilizer rates increased soil‐test K across three soil depths compared to the control K treatment. The application of Mg fertilizer increased soil‐test Mg more at 0–15 cm than at the other two depths (15–30 or 30–45 cm), whereas S fertilizer application increased soil‐test S more at 15–30 cm. The soil samples taken before experiment initiation showed that the lower two soil depths had greater soil‐test K and S concentrations than at the top layer. These findings indicate that more research is needed to appropriately credit subsoil nutrients while making fertilizer recommendations for soybean grown on Southeastern Coastal Plain soils.
Abstract from the paper’s OpenAlex record; open copy licensed cc-by-nc-nd. 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 10
Claim · model-written summary
K, Mg and S fertilization had no significant main or interaction effect on soybean yield, even when initial soil-test S was below critical levels.
- Taxon
- soybean
Glycine maxe0 - Treatment
- K, Mg, and Se0
- Outcome
- soybean yielde0
- Direction
- no significante0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“There was no significant main or interaction effect of K, Mg, and S on soybean yield”
Claim · model-written summary
Leaf K concentrations of control plots at the R2 stage were in the sufficiency range reported for soybean.
- Taxon
- SoybeanGlycine maxt0
- Organ / stage
- R2 growth stagee0
- Outcome
- Leaf K concentrationse0
- Comparator
- control plotse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Soybean”
e0“Leaf K concentrations of control plots measured at the R2 growth stage were in the sufficiency range”
Claim · model-written summary
Leaf Mg and S concentrations of control plots were below the sufficiency ranges.
- Taxon
- SoybeanGlycine maxt0
- Outcome
- leaf Mg and S concentrationse0
- Direction
- belowe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Soybean”
e0“leaf Mg and S concentrations were below the sufficiency ranges”
Claim · model-written summary
Applying S fertilizer increased soybean leaf Mg and S concentrations.
- Taxon
- SoybeanGlycine maxt0
- Treatment
- S fertilizere0
- Outcome
- leaf Mg and S concentrationse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Soybean”
e0“Applying S fertilizer increased leaf Mg and S concentrations”
Claim · model-written summary
Mg fertilizer did not affect soybean leaf Mg concentrations.
- Taxon
- SoybeanGlycine maxt0
- Treatment
- Mg fertilizere0
- Outcome
- leaf Mg concentrationse0
- Direction
- did not affecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Soybean”
e0“Mg fertilizer did not affect leaf Mg concentrations”
Claim · model-written summary
K fertilizer rates increased soil-test K across three soil depths compared with the control K treatment.
- Taxon
- SoybeanGlycine maxt0
- Treatment
- K fertilizer ratese0
- Outcome
- soil‐test Ke0
- Direction
- increasede0
- Qualifier
- across three soil depthse0
- Comparator
- the control K treatmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Soybean”
e0“Applying K fertilizer rates increased soil‐test K across three soil depths compared to the control K treatment”
Claim · model-written summary
Mg fertilizer increased soil-test Mg more at 0-15 cm than at 15-30 or 30-45 cm.
- Taxon
- SoybeanGlycine maxt0
- Treatment
- Mg fertilizere0
- Outcome
- soil‐test Mge0
- Direction
- increasede0
- Qualifier
- more at 0–15 cm than at the other two depths (15–30 or 30–45 cm)e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Soybean”
e0“The application of Mg fertilizer increased soil‐test Mg more at 0–15 cm than at the other two depths (15–30 or 30–45 cm)”
Claim · model-written summary
S fertilizer increased soil-test S more at 15-30 cm than at other depths.
- Taxon
- SoybeanGlycine maxt0
- Treatment
- S fertilizere0
- Outcome
- soil‐test Se0
- Direction
- increasede0
- Qualifier
- more at 15–30 cme0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Soybean”
e0“S fertilizer application increased soil‐test S more at 15–30 cm”
Claim · model-written summary
Soil sampled before the experiment had greater soil-test K and S concentrations at the lower two depths than in the top layer.
- Taxon
- SoybeanGlycine maxt0
- Outcome
- soil‐test K and S concentrationse0
- Direction
- greatere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Soybean”
e0“the lower two soil depths had greater soil‐test K and S concentrations than at the top layer”
Claim · model-written summary
More research is needed to credit subsoil nutrients when making fertilizer recommendations for soybean on Southeastern Coastal Plain soils.
- Taxon
- soybeanGlycine maxe0
- Outcome
- credit subsoil nutrientse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“more research is needed to appropriately credit subsoil nutrients while making fertilizer recommendations for soybean”
The same questions in other papers
magnesium atom · yield · Glycine max (soybean)Results differ
3 papers in the same direction as this paper · 16 in the opposite direction
- positive
- positive
- positive
16 papers more in this group
See all 20 papers →magnesium atom · nutrient: content · Glycine max (soybean)Positive and negative results
10 papers in the same direction as this paper · 4 in the opposite direction
- no effect
- no effect
- no effect
11 papers more in this group
See all 15 papers →sulfur atom · nutrient: content · Glycine max (soybean)Positive and negative results
33 papers in the same direction as this paper · 2 in the opposite direction
- positive
- positive
- no effect
32 papers more in this group
See all 36 papers →fertilization · nutrient: content · Glycine max (soybean)Positive and negative results
264 papers in the same direction as this paper · 44 in the opposite direction · 1 reporting no difference from an alternative
- positive
- no effect
- negative
306 papers more in this group
See all 310 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.