Abstract
Abstract Effects of P source, rate of liming, and time of contact between fertilizer and soil on the availability and uptake by plants of phosphatic fertilizers applied to several Minnesota soils have been studied in greenhouse experiments. Monocalcium phosphate resulted in significantly higher yields and lower P contents of wheat than dicalcium phosphate, and was more available to both wheat and alfalfa. Alfalfa yields generally increased with an increase in the rate of liming. Liming had no apparent effect on the total P content of wheat or alfalfa, but the uptake by alfalfa of P from applied monocalcium phosphate was increased by the 4‐ton per acre rate of lime application. With both phosphate sources, alfalfa yields were highest on the alkaline soils, and lowest on an acid soil. Time of phosphate application had no consistent effect on growth rate or dry matter production of oats, although yield responses to phosphate fertilization were obtained on four soils. Phosphorus content of oats was generally increased when fertilizer was applied ahead of the planting date. Availability of applied phosphate tended to decrease on two high pH soils when fertilizer was applied 20 days or more ahead of planting.
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Claims 15
Claim · model-written summary
Monocalcium phosphate gave higher wheat yields than dicalcium phosphate.
- Taxon
- wheat
Triticum aestivume0 - Treatment
- Monocalcium phosphatee0
- Outcome
- yieldse0
- Direction
- highere0
- Comparator
- dicalcium phosphatee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Monocalcium phosphate resulted in significantly higher yields and lower P contents of wheat than dicalcium phosphate”
Claim · model-written summary
Monocalcium phosphate gave lower wheat P contents than dicalcium phosphate.
- Taxon
- wheatTriticum aestivume0
- Treatment
- Monocalcium phosphatee0
- Outcome
- P contentse0
- Direction
- lowere0
- Comparator
- dicalcium phosphatee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Monocalcium phosphate resulted in significantly higher yields and lower P contents of wheat than dicalcium phosphate”
Claim · model-written summary
Monocalcium phosphate was more available to wheat than dicalcium phosphate.
- Taxon
- wheatTriticum aestivume0
- Outcome
- availablee0
- Direction
- moree0
Not reportedTreatmentComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“was more available to both wheat and alfalfa”
Claim · model-written summary
Monocalcium phosphate was more available to alfalfa than dicalcium phosphate.
- Taxon
- alfalfa
Medicago sativae0 - Outcome
- availablee0
- Direction
- moree0
Not reportedTreatmentComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“was more available to both wheat and alfalfa”
Claim · model-written summary
Alfalfa yields generally rose with liming rate.
- Taxon
- AlfalfaMedicago sativae0
- Treatment
- liminge0
- Outcome
- yieldse0
- Direction
- increasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Alfalfa yields generally increased with an increase in the rate of liming”
Claim · model-written summary
Liming had no apparent effect on wheat total P content.
- Taxon
- wheatTriticum aestivume0
- Treatment
- Liminge0
- Outcome
- total P contente0
- Direction
- no apparent effecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Liming had no apparent effect on the total P content of wheat or alfalfa”
Claim · model-written summary
Liming had no apparent effect on alfalfa total P content.
- Taxon
- alfalfaMedicago sativae0
- Treatment
- Liminge0
- Outcome
- total P contente0
- Direction
- no apparent effecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Liming had no apparent effect on the total P content of wheat or alfalfa”
Claim · model-written summary
Four ton per acre lime raised alfalfa uptake of P from monocalcium phosphate.
- Taxon
- alfalfaMedicago sativae0
- Treatment
- 4‐ton per acre rate of lime applicatione0
- Outcome
- uptake by alfalfa of Pe0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the uptake by alfalfa of P from applied monocalcium phosphate was increased by the 4‐ton per acre rate of lime application”
Claim · model-written summary
Alfalfa yields were highest on alkaline soils.
- Taxon
- alfalfaMedicago sativae0
- Outcome
- yieldse0
- Direction
- higheste0
- Setting
- alkaline soilse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“With both phosphate sources, alfalfa yields were highest on the alkaline soils, and lowest on an acid soil”
Claim · model-written summary
Alfalfa yields were lowest on acid soil.
- Taxon
- alfalfaMedicago sativae0
- Outcome
- yieldse0
- Direction
- loweste0
- Setting
- acid soile0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“With both phosphate sources, alfalfa yields were highest on the alkaline soils, and lowest on an acid soil”
Claim · model-written summary
Phosphate application timing had no consistent effect on oats growth rate.
- Taxon
- oats
Avena sativae0 - Treatment
- Time of phosphate applicatione0
- Outcome
- growth ratee0
- Direction
- no consistent effecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Time of phosphate application had no consistent effect on growth rate or dry matter production of oats”
Claim · model-written summary
Phosphate application timing had no consistent effect on oats dry matter production.
- Taxon
- oatsAvena sativae0
- Treatment
- Time of phosphate applicatione0
- Outcome
- dry matter productione0
- Direction
- no consistent effecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Time of phosphate application had no consistent effect on growth rate or dry matter production of oats”
Claim · model-written summary
Phosphate fertilization raised oats yield on four soils.
Not reportedTaxonComparatorDirection
Verbatim
e0“yield responses to phosphate fertilization were obtained on four soils”
t0“Plants”
Claim · model-written summary
Applying fertilizer before planting generally raised oats phosphorus content.
- Taxon
- oatsAvena sativae0
- Treatment
- fertilizer was applied ahead of the planting datee0
- Outcome
- Phosphorus contente0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Phosphorus content of oats was generally increased when fertilizer was applied ahead of the planting date”
Claim · model-written summary
Early fertilizer application tended to reduce applied phosphate availability on two high pH soils.
- Treatment
- fertilizer was applied 20 days or more ahead of plantinge0
- Outcome
- Availability of applied phosphatee0
- Direction
- decreasee0
- Setting
- two high pH soilse0
Not reportedTaxonComparator
Verbatim
e0“Availability of applied phosphate tended to decrease on two high pH soils when fertilizer was applied 20 days or more ahead of planting”
t0“Plants”
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See all 55 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.