Abstract
Abstract Phosphorus was placed 2, 8, 14, and 20 inches deep in Norfolk loamy fine sand and Red Bay fine sandy loam. In dry years the deeper treatments gave significantly more corn than the shallow treatments when the surface soil had residual fertilizer phosphorus, except on the Red Bay fine sandy loam where placement in the 8‐inch level gave a lower yield than the 2‐inch level. This was probably because the placement was in the plow sole area which was so compact that roots could not develop. When no residual phosphorus was present on Red Bay soil, the 2‐inch treatment gave the best yields. This was because there was not enough phosphorus in the surface soil to promote growth of roots to the fertilizer band and the corn receiving the deeper placements was not stimulated. In wet years corn was able to et sufficient phosphorus from residual fertilizer to promote root penetration, and subsoiling alone was as effective in increasing corn yields as was applied phosphorus.
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 4
Claim · model-written summary
Deep phosphorus placement significantly increased corn yield versus shallow placement in dry years when residual surface phosphorus was present.
- Taxon
- corn
Zea mays subsp. mayse0 - Treatment
- deeper treatmentse0
- Outcome
- corne0
- Direction
- moree0
- Qualifier
- In dry yearse0
- Comparator
- shallow treatmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In dry years the deeper treatments gave significantly more corn than the shallow treatments when the surface soil had residual fertilizer phosphorus”
Claim · model-written summary
On Red Bay fine sandy loam, eight-inch phosphorus placement yielded less than two-inch placement.
- Treatment
- placement in the 8‐inch levele0
- Outcome
- yielde0
- Direction
- lowere0
- Comparator
- 2‐inch levele0
- Setting
- Red Bay fine sandy loame0
Not reportedTaxon
Verbatim
e0“except on the Red Bay fine sandy loam where placement in the 8‐inch level gave a lower yield than the 2‐inch level.”
Claim · model-written summary
Without residual phosphorus on Red Bay soil, two-inch phosphorus placement gave the best corn yields.
Not reportedTaxonComparator
Verbatim
e0“When no residual phosphorus was present on Red Bay soil, the 2‐inch treatment gave the best yields.”
Claim · model-written summary
In wet years, subsoiling alone increased corn yields as effectively as applied phosphorus.
- Taxon
- cornZea mays subsp. mayse0
- Treatment
- subsoiling alonee0
- Outcome
- corn yieldse0
- Direction
- increasinge0
- Qualifier
- In wet yearse0
- Comparator
- applied phosphoruse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In wet years corn was able to et sufficient phosphorus from residual fertilizer to promote root penetration, and subsoiling alone was as effective in increasing corn yields as was applied phosphorus.”
The same questions in other papers
tillage · yield · Zea mays (maize)Positive and negative results
811 papers in the same direction as this paper · 230 in the opposite direction · 57 reporting no difference from an alternative
- positive
- no effect
- negative
1,095 papers more in this group
See all 1,099 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.