Abstract
Questions arise as to the response of soybeans [ Glycine max (L.) Merr.] to starter fertilization on soils with medium soil test levels. Studies were conducted for two years on Coastal Plain soils to determine the response to P, K, and S in starter fertilizers. Rates of application were 0 or 9 lb/acre of P, 17 lb/acre K, and 20 lb/acre S. Dry weight and nutrient concentration were measured S wk after planting; leaf nutrient concentration was measured at flowering; and yield were measured at maturity. Responses to P fertilization were not obtained on sandy Coastal Plain soils with soil test P values > 80 lb/acre nor on poorly drained soils with soil test P values > 54 lb/acre. Potassium application did not increase soybean yields on soils with soil test K values > 140 lb/acre. No response was obtained with S fertilizer on these soils. Phosphorus recommemendations for soils with medium soil test levels are greater than amounts of P removed in the grain. Potassium recommendations at soil test K levels of 140 to 155 lb/acre supplied slightly more than amounts removed in the grain. Leaf nutrient concentrations of P, K, and S at flowering were in the sufficiency range, indicating that at the upper part of the medium availability level the soils can supply adequate amounts of P and K.
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Claims 6
Claim · model-written summary
Soybean showed no response to P fertilization on sandy Coastal Plain soils with soil test P above 80 lb/acre or on poorly drained soils with soil test P above 54 lb/acre.
- Taxon
- soybeans
Glycine maxe0 - Treatment
- P fertilizatione1
- Outcome
- Responsese1
- Direction
- no_changeinferrede1
- Setting
- sandy Coastal Plain soilse1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Questions arise as to the response of soybeans [ Glycine max (L.) Merr.] to starter fertilization on soils with medium soil test levels”
e1“Responses to P fertilization were not obtained on sandy Coastal Plain soils with soil test P values > 80 lb/acre nor on poorly drained soils with soil test P values > 54 lb/acre”
Claim · model-written summary
Potassium application did not increase soybean yields on soils with soil test K above 140 lb/acre.
- Taxon
- soybeansGlycine maxe0
- Treatment
- Potassium applicatione2
- Outcome
- soybean yieldse2
- Direction
- no_changeinferrede2
- Qualifier
- soil test K values > 140 lb/acree2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Questions arise as to the response of soybeans [ Glycine max (L.) Merr.] to starter fertilization on soils with medium soil test levels”
e2“Potassium application did not increase soybean yields on soils with soil test K values > 140 lb/acre”
Claim · model-written summary
No response of soybean was obtained with S fertilizer on these soils.
- Taxon
- soybeansGlycine maxe0
- Treatment
- S fertilizere3
- Outcome
- responsee3
- Direction
- no_changeinferrede3
- Qualifier
- on these soilse3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Questions arise as to the response of soybeans [ Glycine max (L.) Merr.] to starter fertilization on soils with medium soil test levels”
e3“No response was obtained with S fertilizer on these soils”
Claim · model-written summary
Phosphorus recommendations for soils with medium soil test levels are greater than the amounts of P removed in the grain.
- Taxon
- soybeansGlycine maxe0
- Outcome
- Phosphorus recommemendationse4
- Qualifier
- greater than amounts of P removed in the graine4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Questions arise as to the response of soybeans [ Glycine max (L.) Merr.] to starter fertilization on soils with medium soil test levels”
e4“Phosphorus recommemendations for soils with medium soil test levels are greater than amounts of P removed in the grain”
Claim · model-written summary
Potassium recommendations at soil test K levels of 140 to 155 lb/acre supplied slightly more than the amounts removed in the grain.
- Taxon
- soybeansGlycine maxe0
- Outcome
- Potassium recommendationse5
- Qualifier
- soil test K levels of 140 to 155 lb/acree5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Questions arise as to the response of soybeans [ Glycine max (L.) Merr.] to starter fertilization on soils with medium soil test levels”
e5“Potassium recommendations at soil test K levels of 140 to 155 lb/acre supplied slightly more than amounts removed in the grain”
Claim · model-written summary
Leaf nutrient concentrations of P, K and S at flowering were in the sufficiency range.
- Taxon
- soybeansGlycine maxe0
- Outcome
- Leaf nutrient concentrations of P, K, and S at floweringe6
- Qualifier
- in the sufficiency rangee6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Questions arise as to the response of soybeans [ Glycine max (L.) Merr.] to starter fertilization on soils with medium soil test levels”
e6“Leaf nutrient concentrations of P, K, and S at flowering were in the sufficiency range”
The same questions in other papers
potassium · yield · Glycine max (soybean)Results differ
25 papers in the same direction as this paper · 123 in the opposite direction
- positive
- positive
- positive
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