Abstract
A study was conducted on farmers' fields in Kikuyu Division, Kenya, to determine whether inoculating bean seeds with Rhizobium phaseoli could match the N supplied by 200 kg of diammonium phosphate (DAP) for pure stands of the common dry bean (Phaseolus vulgaris). The study was conducted over three seasons using bean cultivars preferred by farmers. Low and erratic rainfall during one of the short rain seasons led to low bean seed yields while diseases associated with too much rain may have reduced yields during the long rain season. Seed yield data indicated no significant differences between DAP and inoculation plus phosphorus and in one season these two treatments gave significantly higher yields compared to the control and inoculation without phosphorus. There was evidence that some bean cultivars may be able to perform better than others in soils with low soil P levels. Although nodulation results indicate that there were indigenous R. phaseoli in all farmers' fields, inoculation, DAP, and inoculation plus P generally increased nodulation and, in one season the latter two treatments significantly increased nodulation compared to the control. In one relatively dry season, DAP significantly reduced nodulation. Where rainfall was adequate and P applied, seed yields under farmers' management were more than double the national average yield of 500 kg/ha.
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Claims 8
Claim · model-written summary
DAP and inoculation plus phosphorus did not differ significantly in bean seed yield
Verbatim
e1“inoculating bean seeds with Rhizobium phaseoli could match the N supplied by 200 kg of diammonium phosphate (DAP) for pure stands of the common dry bean (Phaseolus vulgaris)”
e2“Seed yield data indicated no significant differences between DAP and inoculation plus phosphorus”
Claim · model-written summary
Inoculation plus phosphorus gave higher bean seed yields than the control in one season
Verbatim
e1“inoculating bean seeds with Rhizobium phaseoli could match the N supplied by 200 kg of diammonium phosphate (DAP) for pure stands of the common dry bean (Phaseolus vulgaris)”
e2“Seed yield data indicated no significant differences between DAP and inoculation plus phosphorus”
e3“in one season these two treatments gave significantly higher yields compared to the control and inoculation without phosphorus”
Claim · model-written summary
DAP gave higher bean seed yields than the control in one season
Verbatim
e1“inoculating bean seeds with Rhizobium phaseoli could match the N supplied by 200 kg of diammonium phosphate (DAP) for pure stands of the common dry bean (Phaseolus vulgaris)”
e2“Seed yield data indicated no significant differences between DAP and inoculation plus phosphorus”
e3“in one season these two treatments gave significantly higher yields compared to the control and inoculation without phosphorus”
Claim · model-written summary
Inoculation, DAP and inoculation plus phosphorus generally increased bean nodulation
- Taxon
- common dry beane1
- Treatment
- inoculation, DAP, and inoculation plus Pe4
- Interactor
- Rhizobium phaseoliRhizobium phaseolie1symbiont
- Outcome
- nodulatione4
- Direction
- generally increasede4
Not reportedComparator
Verbatim
e1“inoculating bean seeds with Rhizobium phaseoli could match the N supplied by 200 kg of diammonium phosphate (DAP) for pure stands of the common dry bean (Phaseolus vulgaris)”
e4“inoculation, DAP, and inoculation plus P generally increased nodulation”
Claim · model-written summary
DAP significantly reduced bean nodulation in one relatively dry season
- Taxon
- common dry beane1
- Treatment
- DAPe5
- Outcome
- nodulatione5
- Direction
- reducede5
- Qualifier
- In one relatively dry seasone5
Not reportedComparator
Verbatim
e1“inoculating bean seeds with Rhizobium phaseoli could match the N supplied by 200 kg of diammonium phosphate (DAP) for pure stands of the common dry bean (Phaseolus vulgaris)”
e5“In one relatively dry season, DAP significantly reduced nodulation”
Claim · model-written summary
Bean seed yields under farmers management were more than double the national average where rainfall was adequate and P applied
Verbatim
e1“inoculating bean seeds with Rhizobium phaseoli could match the N supplied by 200 kg of diammonium phosphate (DAP) for pure stands of the common dry bean (Phaseolus vulgaris)”
e6“Where rainfall was adequate and P applied, seed yields under farmers' management were more than double the national average yield of 500 kg/ha”
Claim · model-written summary
Some bean cultivars may perform better than others in soils with low P levels
Verbatim
e1“inoculating bean seeds with Rhizobium phaseoli could match the N supplied by 200 kg of diammonium phosphate (DAP) for pure stands of the common dry bean (Phaseolus vulgaris)”
e7“There was evidence that some bean cultivars may be able to perform better than others in soils with low soil P levels”
Claim · model-written summary
Indigenous Rhizobium phaseoli were present in all farmers fields
- Taxon
- common dry beane1
- Interactor
- R. phaseoliRhizobium phaseolie0symbiont
- Outcome
- indigenous R. phaseolie0
- Setting
- all farmers' fieldse0
Verbatim
e1“inoculating bean seeds with Rhizobium phaseoli could match the N supplied by 200 kg of diammonium phosphate (DAP) for pure stands of the common dry bean (Phaseolus vulgaris)”
e0“there were indigenous R. phaseoli in all farmers' fields”
The same questions in other papers
inoculation · Rhizobium phaseoli · Phaseolus vulgaris (common bean)Positive and negative results
6 papers in the same direction as this paper · 2 in the opposite direction
- no effect
- no effect
- positive
5 papers more in this group
See all 9 papers →phosphorus · Rhizobium phaseoli · Phaseolus vulgaris (common bean)Results agree
1 paper in the same direction as this paper
- positive
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.