Abstract
Though mineral N application impaired nodulation initiation and function, it improves the productivity of common bean. The effect of inorganic application on common bean productivity, however, is dependent on the availability of plant nutrients including nitrogen (N) in the soils. Therefore, multilocation field experiments were conducted at Babillae, Fedis, Haramaya, and Hirna to evaluate the effect of inherent soil fertility status on responsiveness of common bean to different rates of N fertilizer application and its effect on nodulation, yield, and yield components of common bean. The treatments were six levels of N fertilizer (0, 20, 40, 60, 80, and 100 kg N ha−1) laid out in randomized completed block design with three replications. The result revealed that 20 kg N ha−1 application significantly improved the nodule number (NN) and nodule dry weight (NDW) except Hirna site, in which reduction of NN and NDW was observed. Although the remaining investigated yield and yield components were significantly improved due to N fertilizer in all study sites, 40 kg N ha−1 application resulted in significantly increased GY of common bean at Fedis, Haramaya, and Hirna site, while 60 kg N ha−1 at Babillae site. The highest total biomass yield (7011.6 kg ha−1) and GY (2475.28 kg ha−1) of common bean were recorded at Hirna and Haramaya sites, respectively, indicating the importance of better fertile soil for good common bean production. Hence, it can be concluded that the effect of inorganic N on common bean was irrespective of soil fertility rather the total amount of N in soil would affect the need of different rate of inorganic N.
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Claims 9
Claim · model-written summary
20 kg N ha−1 increased nodule number except at Hirna.
- Taxon
- common bean
Phaseolus vulgarist0 - Treatment
- 20 kg N ha−1 applicatione0
- Outcome
- nodule numbere0
- Direction
- improvede0
- Setting
- Hirna sitee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“20 kg N ha−1 application significantly improved the nodule number (NN) and nodule dry weight (NDW) except Hirna site, in which reduction of NN and NDW was observed”
t0“common bean”
Claim · model-written summary
20 kg N ha−1 increased nodule dry weight except at Hirna.
- Taxon
- common beanPhaseolus vulgarist0
- Treatment
- 20 kg N ha−1 applicatione0
- Outcome
- nodule dry weighte0
- Direction
- improvede0
- Setting
- Hirna sitee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“20 kg N ha−1 application significantly improved the nodule number (NN) and nodule dry weight (NDW) except Hirna site, in which reduction of NN and NDW was observed”
t0“common bean”
Claim · model-written summary
At Hirna, 20 kg N ha−1 reduced nodule number and dry weight.
- Taxon
- common beanPhaseolus vulgarist0
- Treatment
- 20 kg N ha−1 applicatione0
- Outcome
- NN and NDWe0
- Direction
- reductione0
- Setting
- Hirna sitee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“20 kg N ha−1 application significantly improved the nodule number (NN) and nodule dry weight (NDW) except Hirna site, in which reduction of NN and NDW was observed”
t0“common bean”
Claim · model-written summary
Nitrogen fertilizer significantly improved the remaining yield components at all sites.
- Taxon
- common beanPhaseolus vulgarist0
- Treatment
- N fertilizere0
- Outcome
- yield and yield componentse0
- Direction
- improvede0
- Setting
- all study sitese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the remaining investigated yield and yield components were significantly improved due to N fertilizer in all study sites”
t0“common bean”
Claim · model-written summary
40 kg N ha−1 significantly increased grain yield at Fedis, Haramaya and Hirna.
- Taxon
- common beanPhaseolus vulgarise0
- Treatment
- 40 kg N ha−1 applicatione0
- Outcome
- GYe0
- Direction
- increasede0
- Setting
- Fedis, Haramaya, and Hirna sitee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“40 kg N ha−1 application resulted in significantly increased GY of common bean at Fedis, Haramaya, and Hirna site”
Claim · model-written summary
60 kg N ha−1 increased grain yield at Babillae.
- Taxon
- common beanPhaseolus vulgarist0
- Treatment
- 60 kg N ha−1e0
- Setting
- Babillae sitee0
Not reportedComparatorOutcomeDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“while 60 kg N ha−1 at Babillae site”
t0“common bean”
Claim · model-written summary
Highest total biomass yield was 7011.6 kg ha−1 at Hirna.
- Taxon
- common beanPhaseolus vulgarise0
- Outcome
- total biomass yielde0
- Direction
- higheste0
- Value
- 7011.6 kg ha−1e0
- Setting
- Hirnae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The highest total biomass yield (7011.6 kg ha−1) and GY (2475.28 kg ha−1) of common bean were recorded at Hirna and Haramaya sites, respectively”
Claim · model-written summary
Highest grain yield was 2475.28 kg ha−1 at Haramaya.
- Taxon
- common beanPhaseolus vulgarise0
- Outcome
- GYe0
- Direction
- higheste0
- Value
- 2475.28 kg ha−1e0
- Setting
- Haramayae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The highest total biomass yield (7011.6 kg ha−1) and GY (2475.28 kg ha−1) of common bean were recorded at Hirna and Haramaya sites, respectively”
Claim · model-written summary
Soil total nitrogen was interpreted as determining the needed inorganic nitrogen rate.
- Taxon
- common beanPhaseolus vulgarist0
- Outcome
- need of different rate of inorganic Ne0
- Setting
- soile0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the total amount of N in soil would affect the need of different rate of inorganic N”
t0“common bean”
The same questions in other papers
nitrogen · symbiosis · Phaseolus vulgaris (common bean)Results differ
8 papers in the same direction as this paper · 22 in the opposite direction
- negative
- negative
- no effect
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See all 31 papers →fertilization · yield · Phaseolus vulgaris (common bean)Positive and negative results
330 papers in the same direction as this paper · 42 in the opposite direction · 3 reporting no difference from an alternative
- positive
- no effect
- no effect
372 papers more in this group
See all 376 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.