Abstract
Abstract Partially acidulated rock phosphate (with H 3 PO 4 ) was studied using additional soils, application rates and preparation methods under growth chamber and field conditions. The yields and P contents of German millet and alfalfa in the growth chamber increased to a maximum at 66 pp2m P application and 20% acidulation on one group of soils and continued to increase with application rate and acidulation degree in another group. No appreciable difference was obtained with three methods of preparation of 20% acidulated material. Average field corn yield on five soils was highest with 20% acidulated material resulting in marked economic advantage of this material.
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Claims 8
Claim · model-written summary
German millet yield reached a maximum at 66 pp2m P and 20% acidulation on one soil group.
- Taxon
- German millete0
- Treatment
- 66 pp2m P application and 20% acidulatione0
- Outcome
- yieldse0
- Direction
- increased to a maximume0
- Setting
- growth chambere0
Not reportedComparator
Verbatim
e0“The yields and P contents of German millet and alfalfa in the growth chamber increased to a maximum at 66 pp2m P application and 20% acidulation on one group of soils”
t0“Partially Acidulated Rock Phosphate as a Source of Phosphorus to Plants: II. Growth Chamber and Field Corn Studies”
e1“The yields and P contents of German millet and alfalfa in the growth chamber”
Claim · model-written summary
Alfalfa yield reached a maximum at 66 pp2m P and 20% acidulation on one soil group.
- Taxon
- alfalfa
Medicago sativae0 - Treatment
- 66 pp2m P application and 20% acidulatione0
- Outcome
- yieldse0
- Direction
- increased to a maximume0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The yields and P contents of German millet and alfalfa in the growth chamber increased to a maximum at 66 pp2m P application and 20% acidulation on one group of soils”
t0“Partially Acidulated Rock Phosphate as a Source of Phosphorus to Plants: II. Growth Chamber and Field Corn Studies”
e1“The yields and P contents of German millet and alfalfa in the growth chamber”
Claim · model-written summary
German millet P content reached a maximum at 66 pp2m P and 20% acidulation.
- Taxon
- German millete0
- Treatment
- 66 pp2m P application and 20% acidulatione0
- Outcome
- P contentse0
- Direction
- increased to a maximume0
Not reportedComparator
Verbatim
e0“The yields and P contents of German millet and alfalfa in the growth chamber increased to a maximum at 66 pp2m P application and 20% acidulation on one group of soils”
t0“Partially Acidulated Rock Phosphate as a Source of Phosphorus to Plants: II. Growth Chamber and Field Corn Studies”
e1“The yields and P contents of German millet and alfalfa in the growth chamber”
Claim · model-written summary
Alfalfa P content reached a maximum at 66 pp2m P and 20% acidulation.
- Taxon
- alfalfaMedicago sativae0
- Treatment
- 66 pp2m P application and 20% acidulatione0
- Outcome
- P contentse0
- Direction
- increased to a maximume0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The yields and P contents of German millet and alfalfa in the growth chamber increased to a maximum at 66 pp2m P application and 20% acidulation on one group of soils”
t0“Partially Acidulated Rock Phosphate as a Source of Phosphorus to Plants: II. Growth Chamber and Field Corn Studies”
e1“The yields and P contents of German millet and alfalfa in the growth chamber”
Claim · model-written summary
Yields and P contents continued to rise with rate and acidulation on another soil group.
Verbatim
e0“continued to increase with application rate and acidulation degree in another group”
t0“Partially Acidulated Rock Phosphate as a Source of Phosphorus to Plants: II. Growth Chamber and Field Corn Studies”
e1“The yields and P contents of German millet and alfalfa in the growth chamber”
Claim · model-written summary
Three preparation methods of 20% acidulated material showed no appreciable difference.
- Taxon
- corn
Zea mays subsp. mayst0 - Treatment
- three methods of preparation of 20% acidulated materiale0
- Outcome
- differencee0
- Direction
- No appreciable differencee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“No appreciable difference was obtained with three methods of preparation of 20% acidulated material”
t0“Partially Acidulated Rock Phosphate as a Source of Phosphorus to Plants: II. Growth Chamber and Field Corn Studies”
e1“The yields and P contents of German millet and alfalfa in the growth chamber”
Claim · model-written summary
Average field corn yield was highest with 20% acidulated material.
- Taxon
- cornZea mays subsp. mayse0
- Treatment
- 20% acidulated materiale0
- Outcome
- field corn yielde0
- Direction
- higheste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Average field corn yield on five soils was highest with 20% acidulated material”
t0“Partially Acidulated Rock Phosphate as a Source of Phosphorus to Plants: II. Growth Chamber and Field Corn Studies”
e1“The yields and P contents of German millet and alfalfa in the growth chamber”
Claim · model-written summary
The 20% acidulated material had marked economic advantage.
- Taxon
- cornZea mays subsp. mayst0
- Outcome
- economic advantagee0
- Direction
- markede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“resulting in marked economic advantage of this material”
t0“Partially Acidulated Rock Phosphate as a Source of Phosphorus to Plants: II. Growth Chamber and Field Corn Studies”
e1“The yields and P contents of German millet and alfalfa in the growth chamber”
The same questions in other papers
phosphorus · yield · Medicago sativa (alfalfa)Results differ
53 papers in the same direction as this paper · 13 in the opposite direction · 1 reporting no difference from an alternative
- no effect
- no effect
- negative
64 papers more in this group
See all 68 papers →phosphorus · nutrient: content · Medicago sativa (alfalfa)Positive and negative results
17 papers in the same direction as this paper · 4 in the opposite direction · 1 reporting no difference from an alternative
- negative
- no effect
- negative
19 papers more in this group
See all 23 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.