Abstract
Abstract Four years' data are reported from a 5 by 5 by 5 by 2 experiment in which nitrogen, phosphorus, potassium and lime respectively, were the variables. The experiment was conducted on Red Bay fine sandy loam in west Florida. No response to nitrogen was obtained. There was a negative response to potash every year when more than 15 pounds of K 2 O per acre as potassium chloride were applied. The level of exchangeable potassium in the soil did not seem to be responsible for the negative response. Ninety pounds of exchangeable potassium per acre was adequate for maximum yields. The lack of response to potassium may have been associated either with the application of the fertilizer potassium in the peanut row or with increasing rates of phosphorus applied as superphosphate. Since high rates of phosphorus are necessary for maximum yields of other crops grown in rotation with peanuts, excess potassium, equivalent to that removed by the peanuts, probably should be applied to the other crops in the rotation. There was a significant yield response to phosphorus every year. When the soil was adequate limed, maximum yields were obtained when the soil contained 45 pounds per acre of P 2 O 5 extractable with 0.002 N H 2 SO 4 buffered at pH 3 with (NH 4 ) 2 SO 4 or 110 pounds per acre of P 2 O 5 extractable with 0.03 N NH 4 F in 0.1 N HCl; 10 of extractant to 1 of soil. Calcium gave significant yield responses three out of four years. Three tons per acre of dolomitic lime were better than one. One ton per acre of lime raised the pH from 5.3 to 5.6 and the exchangeable calcium from 300 to 500 pounds per acre of Ca approximately. When 3 tons per acre of lime were applied, the pH was 6.2 and the exchangeable Ca 850 pounds per acre. Phosphorus interacted with lime. Less fertilizer phosphorus was necessary to give maximum yields on limed than unlimed soil.
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Claims 16
Claim · model-written summary
No yield response of peanut to nitrogen was obtained.
- Taxon
- Peanuts
Arachis hypogaeat0 - Treatment
- nitrogene2
- Outcome
- responsee2
- Direction
- No responsee2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“II. Peanuts”
e2“No response to nitrogen was obtained”
Claim · model-written summary
Potash above 15 pounds K2O per acre as potassium chloride gave a negative response every year.
- Taxon
- PeanutsArachis hypogaeat0
- Treatment
- more than 15 pounds of K 2 O per acre as potassium chloridee3
- Outcome
- response to potashe3
- Direction
- negativee3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“II. Peanuts”
e3“There was a negative response to potash every year when more than 15 pounds of K 2 O per acre as potassium chloride were applied”
Claim · model-written summary
Ninety pounds of exchangeable potassium per acre was adequate for maximum peanut yields.
- Taxon
- PeanutsArachis hypogaeat0
- Outcome
- maximum yieldse4
- Qualifier
- Ninety pounds of exchangeable potassium per acre was adequatee4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“II. Peanuts”
e4“Ninety pounds of exchangeable potassium per acre was adequate for maximum yields”
Claim · model-written summary
The lack of peanut response to potassium may be associated with fertilizer potassium placed in the peanut row or with increasing phosphorus rates.
- Taxon
- PeanutsArachis hypogaeat0
- Treatment
- increasing rates of phosphoruse5
- Outcome
- The lack of response to potassiume5
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“II. Peanuts”
e5“The lack of response to potassium may have been associated either with the application of the fertilizer potassium in the peanut row or with increasing rates of phosphorus applied as superphosphate”
Claim · model-written summary
Excess potassium equal to that removed by peanuts should probably be applied to the other crops in the rotation.
- Taxon
- PeanutsArachis hypogaeat0
- Outcome
- should be applied to the other crops in the rotatione6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“II. Peanuts”
e6“excess potassium, equivalent to that removed by the peanuts, probably should be applied to the other crops in the rotation”
Claim · model-written summary
A significant peanut yield response to phosphorus was obtained every year.
- Taxon
- PeanutsArachis hypogaeat0
- Treatment
- phosphoruse7
- Outcome
- yielde7
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“II. Peanuts”
e7“There was a significant yield response to phosphorus every year”
Claim · model-written summary
On adequately limed soil, maximum peanut yields were obtained at 45 pounds per acre of soil P2O5 extractable with the 0.002 N H2SO4 method.
- Taxon
- PeanutsArachis hypogaeat0
- Outcome
- maximum yieldse1
- Value
- 45 pounds per acre of P 2 O 5e1
- Qualifier
- When the soil was adequate limede1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“II. Peanuts”
e1“When the soil was adequate limed, maximum yields were obtained when the soil contained 45 pounds per acre of P 2 O 5 extractable with 0.002 N H 2 SO 4 buffered at pH 3 with (NH 4 ) 2 SO 4 or 110 pounds per acre of P 2 O 5 extractable with 0.03 N NH 4 F in 0.1 N HCl”
Claim · model-written summary
On adequately limed soil, maximum peanut yields were obtained at 110 pounds per acre of soil P2O5 extractable with the 0.03 N NH4F method.
- Taxon
- PeanutsArachis hypogaeat0
- Outcome
- maximum yieldse1
- Value
- 110 pounds per acre of P 2 O 5e1
- Qualifier
- When the soil was adequate limede1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“II. Peanuts”
e1“When the soil was adequate limed, maximum yields were obtained when the soil contained 45 pounds per acre of P 2 O 5 extractable with 0.002 N H 2 SO 4 buffered at pH 3 with (NH 4 ) 2 SO 4 or 110 pounds per acre of P 2 O 5 extractable with 0.03 N NH 4 F in 0.1 N HCl”
Claim · model-written summary
Calcium gave significant peanut yield responses in three out of four years.
- Taxon
- PeanutsArachis hypogaeat0
- Treatment
- Calciume0
- Outcome
- yielde0
- Qualifier
- three out of four yearse0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“II. Peanuts”
e0“Calcium gave significant yield responses three out of four years”
Claim · model-written summary
Three tons per acre of dolomitic lime gave better peanut results than one ton per acre.
- Taxon
- PeanutsArachis hypogaeat0
- Treatment
- Three tons per acre of dolomitic limee0
- Outcome
- better than onee0
- Direction
- bettere0
- Comparator
- onee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“II. Peanuts”
e0“Three tons per acre of dolomitic lime were better than one”
Claim · model-written summary
One ton per acre of lime raised soil pH from 5.3 to 5.6.
Not reportedTaxonComparator
Verbatim
t0“II. Peanuts”
e0“One ton per acre of lime raised the pH from 5.3 to 5.6 and the exchangeable calcium from 300 to 500 pounds per acre of Ca approximately”
Claim · model-written summary
One ton per acre of lime raised exchangeable calcium from 300 to 500 pounds per acre.
- Treatment
- One ton per acre of limee0
- Outcome
- exchangeable calciume0
- Direction
- raisede0
- Value
- 300 to 500 pounds per acree0
Not reportedTaxonComparator
Verbatim
t0“II. Peanuts”
e0“One ton per acre of lime raised the pH from 5.3 to 5.6 and the exchangeable calcium from 300 to 500 pounds per acre of Ca approximately”
Claim · model-written summary
With 3 tons per acre of lime, soil pH was 6.2.
Not reportedTaxon
Verbatim
t0“II. Peanuts”
e0“When 3 tons per acre of lime were applied, the pH was 6.2 and the exchangeable Ca 850 pounds per acre”
Claim · model-written summary
With 3 tons per acre of lime, exchangeable calcium was 850 pounds per acre.
- Outcome
- exchangeable Cae0
- Value
- 850 pounds per acree0
- Qualifier
- When 3 tons per acre of lime were appliede0
Not reportedTaxon
Verbatim
t0“II. Peanuts”
e0“When 3 tons per acre of lime were applied, the pH was 6.2 and the exchangeable Ca 850 pounds per acre”
Claim · model-written summary
Phosphorus interacted with lime in peanut yield response.
- Taxon
- PeanutsArachis hypogaeat0
- Treatment
- limee0
- Outcome
- Phosphorus interactede0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“II. Peanuts”
e0“Phosphorus interacted with lime”
Claim · model-written summary
Less fertilizer phosphorus was needed for maximum peanut yields on limed than on unlimed soil.
- Taxon
- PeanutsArachis hypogaeat0
- Treatment
- limede0
- Outcome
- Less fertilizer phosphorus was necessary to give maximum yieldse0
- Direction
- Lesse0
- Comparator
- unlimed soile0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“II. Peanuts”
e0“Less fertilizer phosphorus was necessary to give maximum yields on limed than unlimed soil”
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See all 142 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.