Abstract
Abstract Phosphorus uptake by oat plants grown in the greenhouse on 2 soils fertilized with pellets of concentrated superphosphate (CSP) alone or of mixtures of CSP and each of 5 salts was measured. With Hartsells fine sandy loam (pH 5.2) yields of P were in the order: CSP < CSP + KCl ≤ CSP + NH 4 Cl ≤ CSP + NH 4 NO 3 < CSP + (NH 4 ) 2 SO 4 ≤ CSP + KNO 3 . With Mountview silt loam (pH 6.6) yields of P were in the order: CSP < CSP + KCl < CSP + (NH 4 ) 2 SO 4 ≤ CSP + NH 4 Cl ≤ CSP + NH 4 NO 3 ≤ CSP + KNO 3 . After pellets of CSP, CSP + KNO 3 , and CSP + NH 4 NO 3 had reacted with the moist soils for 3 weeks, samples of soil were taken at increments of distance from the center of the pellet residue. Both water‐soluble P (1:15 soil‐water extracts) and P extractable in 6 N HCl were linear functions of distance of the sample from the center of the pellet residue. The constants in the linear equations depended upon the composition of the pellet. The summation, over the total volume of soil influenced by fertilizer, of the products of water‐soluble P × volume of soil containing this concentration of water‐soluble P was well correlated with the uptake of P by oats in the greenhouse experiment. Thus, the effect of the associated salts on the availability of the CSP was largely explained on the basis of measured chemical differences. Any effects on physiology of the plants were of secondary importance in this experiment.
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 7
Claim · model-written summary
On Hartsells fine sandy loam, oat P yields ranked CSP < CSP + KCl ≤ CSP + NH 4 Cl ≤ CSP + NH 4 NO 3 < CSP + (NH 4 ) 2 SO 4 ≤ CSP + KNO 3 in the greenhouse.
- Taxon
- oat plants
Avena sativae0 - Treatment
- mixtures of CSP and each of 5 saltse0
- Outcome
- yields of Pe1
- Direction
- in the ordere1
- Comparator
- CSPe1
- Setting
- Hartsells fine sandy loame1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Phosphorus uptake by oat plants grown in the greenhouse on 2 soils fertilized with pellets of concentrated superphosphate (CSP) alone or of mixtures of CSP and each of 5 salts was measured”
e1“With Hartsells fine sandy loam (pH 5.2) yields of P were in the order: CSP < CSP + KCl ≤ CSP + NH 4 Cl ≤ CSP + NH 4 NO 3 < CSP + (NH 4 ) 2 SO 4 ≤ CSP + KNO 3”
Claim · model-written summary
On Mountview silt loam, oat P yields ranked CSP < CSP + KCl < CSP + (NH 4 ) 2 SO 4 ≤ CSP + NH 4 Cl ≤ CSP + NH 4 NO 3 ≤ CSP + KNO 3.
- Taxon
- oat plantsAvena sativae0
- Treatment
- mixtures of CSP and each of 5 saltse0
- Outcome
- yields of Pe2
- Direction
- in the ordere2
- Comparator
- CSPe2
- Setting
- Mountview silt loame2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Phosphorus uptake by oat plants grown in the greenhouse on 2 soils fertilized with pellets of concentrated superphosphate (CSP) alone or of mixtures of CSP and each of 5 salts was measured”
e2“With Mountview silt loam (pH 6.6) yields of P were in the order: CSP < CSP + KCl < CSP + (NH 4 ) 2 SO 4 ≤ CSP + NH 4 Cl ≤ CSP + NH 4 NO 3 ≤ CSP + KNO 3”
Claim · model-written summary
Water‐soluble P in soil was a linear function of distance from the center of the pellet residue.
- Taxon
- oat plantsAvena sativae0
- Outcome
- water‐soluble Pe3
- Qualifier
- linear functions of distance of the sample from the center of the pellet residuee3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Phosphorus uptake by oat plants grown in the greenhouse on 2 soils fertilized with pellets of concentrated superphosphate (CSP) alone or of mixtures of CSP and each of 5 salts was measured”
e3“Both water‐soluble P (1:15 soil‐water extracts) and P extractable in 6 N HCl were linear functions of distance of the sample from the center of the pellet residue”
Claim · model-written summary
P extractable in 6 N HCl in soil was a linear function of distance from the center of the pellet residue.
- Taxon
- oat plantsAvena sativae0
- Outcome
- P extractable in 6 N HCle3
- Qualifier
- linear functions of distance of the sample from the center of the pellet residuee3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Phosphorus uptake by oat plants grown in the greenhouse on 2 soils fertilized with pellets of concentrated superphosphate (CSP) alone or of mixtures of CSP and each of 5 salts was measured”
e3“Both water‐soluble P (1:15 soil‐water extracts) and P extractable in 6 N HCl were linear functions of distance of the sample from the center of the pellet residue”
Claim · model-written summary
The summation of water-soluble P over the soil volume influenced by fertilizer was well correlated with P uptake by oats in the greenhouse.
- Taxon
- oatsAvena sativae4
- Outcome
- uptake of Pe4
- Setting
- greenhouse experimente4
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e4“was well correlated with the uptake of P by oats in the greenhouse experiment”
Claim · model-written summary
The effect of associated salts on CSP availability was largely explained by measured chemical differences.
- Taxon
- oat plantsAvena sativae0
- Outcome
- availability of the CSPe5
- Qualifier
- measured chemical differencese5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Phosphorus uptake by oat plants grown in the greenhouse on 2 soils fertilized with pellets of concentrated superphosphate (CSP) alone or of mixtures of CSP and each of 5 salts was measured”
e5“the effect of the associated salts on the availability of the CSP was largely explained on the basis of measured chemical differences”
Claim · model-written summary
Effects of the associated salts on oat plant physiology were of secondary importance.
- Taxon
- oat plantsAvena sativae0
- Outcome
- effects on physiology of the plantse6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Phosphorus uptake by oat plants grown in the greenhouse on 2 soils fertilized with pellets of concentrated superphosphate (CSP) alone or of mixtures of CSP and each of 5 salts was measured”
e6“Any effects on physiology of the plants were of secondary importance in this experiment”
The same questions in other papers
phosphorus · yield · Avena sativa (oats)Results differ
22 papers in the same direction as this paper · 4 in the opposite direction
- no effect
- negative
- no effect
23 papers more in this group
See all 27 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.