Abstract
Abstract The influence of soil moisture regimes and P sources on the response of alfalfa to P was studied in the growth chamber. Surface samples of two calcareous British Columbia soils, Machete stony sandy loam and the Nisconlith clay loam were used. Alfalfa yield and P uptake were highest when soil moisture tension was allowed to reach a maximum of 2.0 bars and subsequently reduced to 0.2 bars. The P sources were almost equally available with this regime. Calcium metaphosphate and anhydrous dicalcium phosphate produced the highest yields. P content of alfalfa was highest with monoammonium phosphate on the Machete soil. Monocalcium phosphate resulted in the highest tissue P with the Nisconlith soil. Amount of P removed from the soil, with the exception of hydroxyapatitc, was not markedly influenced by P source. Hydroxyapatitetreated soil released the lowest amount of NaHCO 3 ‐extractable P.
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Claims 9
Claim · model-written summary
Alfalfa yield was highest when moisture tension cycled from 2.0 to 0.2 bars.
- Taxon
- Alfalfa
Medicago sativae0 - Treatment
- soil moisture tension was allowed to reach a maximum of 2.0 bars and subsequently reduced to 0.2 barse0
- Outcome
- Alfalfa yielde0
- Direction
- higheste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Alfalfa yield and P uptake were highest when soil moisture tension was allowed to reach a maximum of 2.0 bars and subsequently reduced to 0.2 bars.”
Claim · model-written summary
Alfalfa phosphorus uptake was highest under the same moisture regime.
- Taxon
- AlfalfaMedicago sativae0
- Treatment
- soil moisture tension was allowed to reach a maximum of 2.0 bars and subsequently reduced to 0.2 barse0
- Outcome
- P uptakee0
- Direction
- higheste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Alfalfa yield and P uptake were highest when soil moisture tension was allowed to reach a maximum of 2.0 bars and subsequently reduced to 0.2 bars.”
Claim · model-written summary
P sources were almost equally available under this moisture regime.
Not reportedTaxon
Verbatim
e0“The P sources were almost equally available with this regime.”
Claim · model-written summary
Calcium metaphosphate produced the highest yield.
Not reportedTaxonComparator
Verbatim
e0“Calcium metaphosphate and anhydrous dicalcium phosphate produced the highest yields.”
Claim · model-written summary
Anhydrous dicalcium phosphate produced the highest yield.
Not reportedTaxonComparator
Verbatim
e0“Calcium metaphosphate and anhydrous dicalcium phosphate produced the highest yields.”
Claim · model-written summary
Monoammonium phosphate gave the highest alfalfa P content on Machete soil.
- Taxon
- alfalfaMedicago sativae0
- Treatment
- monoammonium phosphatee0
- Outcome
- P content of alfalfae0
- Direction
- higheste0
- Setting
- Machete soile0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“P content of alfalfa was highest with monoammonium phosphate on the Machete soil.”
Claim · model-written summary
Monocalcium phosphate gave the highest tissue P on Nisconlith soil.
- Taxon
- AlfalfaMedicago sativat0
- Treatment
- Monocalcium phosphatee0
- Outcome
- tissue Pe0
- Direction
- higheste0
- Setting
- Nisconlith soile0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Alfalfa”
e0“Monocalcium phosphate resulted in the highest tissue P with the Nisconlith soil.”
Claim · model-written summary
P removal from soil was not markedly influenced by P source other than hydroxyapatitc.
- Taxon
- AlfalfaMedicago sativat0
- Treatment
- P sourcee0
- Outcome
- Amount of P removed from the soile0
- Direction
- not markedly influencede0
- Qualifier
- with the exception of hydroxyapatitce0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Alfalfa”
e0“Amount of P removed from the soil, with the exception of hydroxyapatitc, was not markedly influenced by P source.”
Claim · model-written summary
Hydroxyapatite-treated soil released the least extractable P.
- Taxon
- AlfalfaMedicago sativat0
- Treatment
- Hydroxyapatitetreated soile0
- Outcome
- NaHCO 3 ‐extractable Pe0
- Direction
- loweste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Alfalfa”
e0“Hydroxyapatitetreated soil released the lowest amount of NaHCO 3 ‐extractable P.”
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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.