Abstract
Abstract Factorial combinations of concentrated superphosphate at rates of 0, 22, 45, 90, and 180 kg/ha of P and ammonium nitrate at rates of 0, 45, and 90 kg/ha of N were broadcast on a Williams loam soil and incorporated with a tandem disk just before seeding spring wheat ( Triticum aestivum L., ‘Fortuna’). Samples of roots and tops taken at the end of tillering revealed that most of the effect of P and N‐P fertilization was accounted for by changes in plant morphology. Tillers per plant (T) were positively correlated with adventitious roots per plant (R), [T = 1.21 + 0.23R, r 3 = 0.96]. Heads per ha (H) were linearly related to adventitious roots per plant (R), [H = 1.99 + 0.24R, r 3 = 0.94], and to tillers per plant (T), [H = 0.89 + 1.00T, r 3 = 0.88]. Number of heads per ha accounted for 97% of the yield variance associated with fertilizer treatments. Number of kernels per head and kernel weights were not significantly influenced by N and P fertilization. The regression of grain yield on number of adventitious roots per plant accounted for 93% of the variations in grain yield associated with fertilizer treatments. Grain yields increased from 1984 to 2706 kg/ha (29.5 to 40.2 bu/A) when 45 kg/ha of P was added alone and to 3306 kg/ha (48.2 bu/A) when 45 kg/ha of N was also applied. Higher rates of P, with or without added N, failed to further increase grain yield.
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 10
Claim · model-written summary
Phosphorus and nitrogen phosphorus fertilizer effects were largely explained by morphological changes.
- Taxon
- Spring Wheat
Triticum aestivumt0 - Treatment
- P and N‐P fertilizatione0
- Outcome
- changes in plant morphologye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“most of the effect of P and N‐P fertilization was accounted for by changes in plant morphology”
t0“Adventitious Roots, Tillers, and Grain Yields of Spring Wheat as Influenced by N‐P Fertilization1”
Claim · model-written summary
Tillers per plant correlated positively with adventitious roots per plant.
- Taxon
- Spring WheatTriticum aestivumt0
- Organ / stage
- adventitious roots per plante0
- Outcome
- Tillers per plante0
- Direction
- positively correlatede0
- Value
- r 3 = 0.96e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Tillers per plant (T) were positively correlated with adventitious roots per plant (R), [T = 1.21 + 0.23R, r 3 = 0.96]”
t0“Adventitious Roots, Tillers, and Grain Yields of Spring Wheat as Influenced by N‐P Fertilization1”
Claim · model-written summary
Heads per hectare related linearly to adventitious roots per plant.
- Taxon
- Spring WheatTriticum aestivumt0
- Organ / stage
- adventitious roots per plante0
- Outcome
- Heads per hae0
- Value
- r 3 = 0.94e0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Heads per ha (H) were linearly related to adventitious roots per plant (R), [H = 1.99 + 0.24R, r 3 = 0.94]”
t0“Adventitious Roots, Tillers, and Grain Yields of Spring Wheat as Influenced by N‐P Fertilization1”
Claim · model-written summary
Heads per hectare related linearly to tillers per plant.
- Taxon
- Spring WheatTriticum aestivumt0
- Organ / stage
- tillers per plante0
- Outcome
- Headse1
- Value
- r 3 = 0.88e0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“and to tillers per plant (T), [H = 0.89 + 1.00T, r 3 = 0.88]”
e1“Heads per ha”
t0“Adventitious Roots, Tillers, and Grain Yields of Spring Wheat as Influenced by N‐P Fertilization1”
Claim · model-written summary
Heads per hectare explained 97% of fertilizer associated yield variance.
- Taxon
- Spring WheatTriticum aestivumt0
- Organ / stage
- heads per hae0
- Outcome
- yield variancee0
- Value
- 97%e0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Number of heads per ha accounted for 97% of the yield variance associated with fertilizer treatments.”
t0“Adventitious Roots, Tillers, and Grain Yields of Spring Wheat as Influenced by N‐P Fertilization1”
Claim · model-written summary
Nitrogen and phosphorus fertilization did not significantly influence kernels per head or kernel weight.
- Taxon
- Spring WheatTriticum aestivumt0
- Treatment
- N and P fertilizatione0
- Outcome
- Number of kernels per head and kernel weightse0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Number of kernels per head and kernel weights were not significantly influenced by N and P fertilization.”
t0“Adventitious Roots, Tillers, and Grain Yields of Spring Wheat as Influenced by N‐P Fertilization1”
Claim · model-written summary
Adventitious roots per plant explained 93% of fertilizer associated grain yield variation.
- Taxon
- Spring WheatTriticum aestivumt0
- Organ / stage
- adventitious roots per plante0
- Outcome
- grain yielde0
- Value
- 93%e0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The regression of grain yield on number of adventitious roots per plant accounted for 93% of the variations in grain yield associated with fertilizer treatments.”
t0“Adventitious Roots, Tillers, and Grain Yields of Spring Wheat as Influenced by N‐P Fertilization1”
Claim · model-written summary
Adding phosphorus alone increased grain yield from 1984 to 2706 kg/ha.
- Taxon
- Spring WheatTriticum aestivumt0
- Treatment
- 45 kg/ha of Pe0
- Outcome
- Grain yieldse0
- Direction
- increasede0
- Value
- 2706 kg/hae0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Grain yields increased from 1984 to 2706 kg/ha (29.5 to 40.2 bu/A) when 45 kg/ha of P was added alone”
t0“Adventitious Roots, Tillers, and Grain Yields of Spring Wheat as Influenced by N‐P Fertilization1”
Claim · model-written summary
Adding nitrogen with phosphorus increased grain yield to 3306 kg/ha.
- Taxon
- Spring WheatTriticum aestivumt0
- Treatment
- 45 kg/ha of Ne0
- Outcome
- Grain Yieldst0
- Direction
- increaseinferrede0
- Value
- 3306 kg/hae0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“and to 3306 kg/ha (48.2 bu/A) when 45 kg/ha of N was also applied”
t0“Adventitious Roots, Tillers, and Grain Yields of Spring Wheat as Influenced by N‐P Fertilization1”
Claim · model-written summary
Higher phosphorus rates did not further increase grain yield.
- Taxon
- Spring WheatTriticum aestivumt0
- Treatment
- Higher rates of Pe0
- Outcome
- grain yielde0
- Direction
- failed to further increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Higher rates of P, with or without added N, failed to further increase grain yield.”
t0“Adventitious Roots, Tillers, and Grain Yields of Spring Wheat as Influenced by N‐P Fertilization1”
The same questions in other papers
phosphorus · yield · Triticum aestivum (wheat)Positive and negative results
47 papers in the same direction as this paper · 524 in the opposite direction
- positive
- positive
- positive
568 papers more in this group
See all 572 papers →nitrogen · yield · Triticum aestivum (wheat)Positive and negative results
323 papers in the same direction as this paper · 1,737 in the opposite direction
- positive
- positive
- positive
2,057 papers more in this group
See all 2,061 papers →fertilization · yield · Triticum aestivum (wheat)Positive and negative results
322 papers in the same direction as this paper · 3,115 in the opposite direction
- positive
- positive
- positive
3,434 papers more in this group
See all 3,438 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.