Abstract
Summary A factorial (3 × 3 × 3) experiment using three levels of nitrogen, phosphate and potassium was conducted to evaluate the effects of these elements on the formation of nodules. Results indicated that increasing levels of nitrogen depressed the formation of both effective and ineffective nodules, but phosphorus and potash did not produce any significant effects. Although the soils of the experimental plots were highly leached and strongly acid in nature, the native strains of rhizobia were able to produce copious amounts of effective nodules on plants growing on plots where no nitrogen was applied. It appeared that the naturally occurring rhizobia strains in these soils are well adapted to their natural environments.
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 5
Claim · model-written summary
Increasing nitrogen depressed effective and ineffective nodule formation in cowpea.
- Taxon
- cowpea
Vigna unguiculatat0 - Treatment
- increasing levels of nitrogene0
- Outcome
- formation of both effective and ineffective nodulese0
- Direction
- depressede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“increasing levels of nitrogen depressed the formation of both effective and ineffective nodules”
t0“Effects of Nitrogen, Phosphorus and Potassium on Nodulation in Cowpea”
Claim · model-written summary
Phosphorus did not significantly affect cowpea nodule formation.
- Taxon
- cowpeaVigna unguiculatat0
- Treatment
- phosphoruse0
- Outcome
- nodulese0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“formation of both effective and ineffective nodules, but phosphorus and potash did not produce any significant effects”
t0“Effects of Nitrogen, Phosphorus and Potassium on Nodulation in Cowpea”
Claim · model-written summary
Potash did not significantly affect cowpea nodule formation.
- Taxon
- cowpeaVigna unguiculatat0
- Treatment
- potashe0
- Outcome
- nodulese0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“formation of both effective and ineffective nodules, but phosphorus and potash did not produce any significant effects”
t0“Effects of Nitrogen, Phosphorus and Potassium on Nodulation in Cowpea”
Claim · model-written summary
Native rhizobia produced abundant effective nodules on cowpea without applied nitrogen despite leached, acidic soils.
- Taxon
- cowpeaVigna unguiculatat0
- Treatment
- no nitrogene0
- Interactor
- rhizobiae0symbiont
- Outcome
- effective nodulese0
- Direction
- copious amountse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the native strains of rhizobia were able to produce copious amounts of effective nodules on plants growing on plots where no nitrogen was applied”
t0“Effects of Nitrogen, Phosphorus and Potassium on Nodulation in Cowpea”
Claim · model-written summary
The authors infer that native rhizobia are adapted to local soil conditions.
- Taxon
- cowpeaVigna unguiculatat0
- Interactor
- rhizobiae0symbiont
- Outcome
- well adapted to their natural environmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the naturally occurring rhizobia strains in these soils are well adapted to their natural environments”
t0“Effects of Nitrogen, Phosphorus and Potassium on Nodulation in Cowpea”
The same questions in other papers
phosphorus · symbiosis · Vigna unguiculata (cowpea)Results differ
3 papers in the same direction as this paper · 28 in the opposite direction
- positive
- positive
- positive
28 papers more in this group
See all 32 papers →potassium · symbiosis · Vigna unguiculata (cowpea)Positive and negative results
2 in the opposite direction
- positive
- positive
nitrogen · symbiosis · Vigna unguiculata (cowpea)Positive and negative results
3 papers in the same direction as this paper · 13 in the opposite direction
- positive
- positive
- positive
13 papers more in this group
See all 17 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.