Abstract
Abstract Rock phosphate was acidulated with H 3 PO 4 at 0, 10, 20, 50, and 100% of that required to convert the rock phosphate to triple superphosphate. These materials plus a check (0 P) and H 3 PO 4 alone were established as treatments on an acid soil (AB‐38) in 1‐gallon containers in a growth chamber. Representative treatments were also made to a Miami (County) soil. The phosphate treatments were applied both in bands and mixed with the soil. In general, German millet and alfalfa yielded about as much and contained as much P in the tissue from 10% acidulated phosphate as from 100% acidulated. Corn seedlings took up P in proportion to the relative solubilities of rock phosphate, FePO 4 , AlPO 4 , Ca 3 (PO 4 ) 2 , and KH 2 PO 4 in sand. Yet they took up much less P when the phosphates were added to the soil, the amount being nearly constant regardless of the phosphate source added. This seems to be evidence for depression by common‐ion action of the availability of P in comparatively insoluble phosphates whether added to or formed in the soil. Plant response to the partially acidulated phosphates and to H 3 PO 4 was discussed in the light of recent reports on phosphate reaction products in the soil. This led to the suggestion that detrimental effects of the common ion may be minimized by the partial acidulation treatments such that the environment for the soluble phosphate may be largely defined by the unreacted rock phosphate. The comparatively favorable plant response to the partially acidulated material and the economy of its production make partial acidulation appear to have very promising practical applications.
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Claims 9
Claim · model-written summary
German millet yield from 10% acidulated phosphate was about that from 100% acidulated phosphate.
Verbatim
e0“German millet and alfalfa yielded about as much and contained as much P in the tissue from 10% acidulated phosphate as from 100% acidulated.”
Claim · model-written summary
Alfalfa yield from 10% acidulated phosphate was about that from 100% acidulated phosphate.
- Taxon
- alfalfa
Medicago sativae0 - Treatment
- 10% acidulated phosphatee0
- Outcome
- yieldede0
- Direction
- about as muche0
- Comparator
- 100% acidulatede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“German millet and alfalfa yielded about as much and contained as much P in the tissue from 10% acidulated phosphate as from 100% acidulated.”
Claim · model-written summary
German millet tissue P from 10% acidulated phosphate matched that from 100%.
Verbatim
e0“German millet and alfalfa yielded about as much and contained as much P in the tissue from 10% acidulated phosphate as from 100% acidulated.”
Claim · model-written summary
Alfalfa tissue P from 10% acidulated phosphate matched that from 100%.
- Taxon
- alfalfaMedicago sativae0
- Treatment
- 10% acidulated phosphatee0
- Outcome
- P in the tissuee0
- Direction
- as muche0
- Comparator
- 100% acidulatede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“German millet and alfalfa yielded about as much and contained as much P in the tissue from 10% acidulated phosphate as from 100% acidulated.”
Claim · model-written summary
Corn seedling P uptake in sand tracked phosphate solubility.
- Taxon
- Corn
Zea mays subsp. mayse0 - Treatment
- rock phosphate, FePO 4 , AlPO 4 , Ca 3 (PO 4 ) 2 , and KH 2 PO 4e0
- Outcome
- took up Pe0
- Direction
- in proportion toe0
- Setting
- sande0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Corn seedlings took up P in proportion to the relative solubilities of rock phosphate, FePO 4 , AlPO 4 , Ca 3 (PO 4 ) 2 , and KH 2 PO 4 in sand.”
Claim · model-written summary
Corn seedlings took up less P when phosphate was added to soil.
- Taxon
- CornZea mays subsp. mayse0
- Treatment
- phosphates were added to the soile0
- Outcome
- Pe0
- Direction
- much lesse0
- Comparator
- sande0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Corn seedlings took up P in proportion to the relative solubilities of rock phosphate, FePO 4 , AlPO 4 , Ca 3 (PO 4 ) 2 , and KH 2 PO 4 in sand. Yet they took up much less P when the phosphates were added to the soil, the amount being nearly constant regardless of the phosphate source added.”
Claim · model-written summary
Soil P uptake was nearly constant across phosphate sources.
- Taxon
- CornZea mays subsp. mayst0
- Outcome
- amounte0
- Direction
- nearly constante0
- Comparator
- phosphate sourcee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the amount being nearly constant regardless of the phosphate source added.”
t0“Corn seedlings took up P”
Claim · model-written summary
The authors suggest partial acidulation may minimize detrimental common ion effects.
- Taxon
- PlantsViridiplantaet0
- Outcome
- partial acidulation treatmentse0
- Qualifier
- detrimental effects of the common ione0
Verbatim
e0“This led to the suggestion that detrimental effects of the common ion may be minimized by the partial acidulation treatments”
t0“Phosphorus to Plants”
Claim · model-written summary
Partial acidulation appears promising in practice owing to plant response and production economy.
- Taxon
- PlantsViridiplantaet0
- Outcome
- partial acidulatione0
- Qualifier
- comparatively favorable plant responsee0
Verbatim
e0“The comparatively favorable plant response to the partially acidulated material and the economy of its production make partial acidulation appear to have very promising practical applications.”
t0“Phosphorus to Plants”
The same questions in other papers
phosphate · nutrient: content · Zea mays (maize)Positive and negative results
2 papers in the same direction as this paper · 5 in the opposite direction
- positive
- positive
- positive
4 papers more in this group
See all 8 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.