Abstract
Field experiments were conducted at Adami Tulu, Ethiopia, for two successive dry seasons to investigate how nitrogen levels and deficit irrigation affect the yield and its related components, and the protein content of snap beans. The treatments were deficit irrigation with three levels (50, 75, and 100% ETc) and application of nitrogen with four levels (0, 46, 92, and 138 kg·N·ha−1), which were set up as split-plot arrangement, with irrigation being as the main plot and nitrogen levels as subplot, replicated thrice. Results showed that the pod yield had a substantial impact ( <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" id="M1"><a:mi>p</a:mi><a:mo><</a:mo><a:mn>0.01</a:mn></a:math> ) on the interaction between the two factors; i.e., interaction of 100% ETc and 92 kg nitrogen levels per hectare recorded the highest pod yield (22.69 t·ha−1), but treatment combinations of 50% ETc and no nitrogen application produced the lowest amount of overall pod yield (6.922 tons per hectare). However, the results showed that the application of 75% ETc in combination with 92 kg nitrogen per hectare recorded the highest protein concentration (17.718%) but statistically equivalent to 138 kg nitrogen per hectare combined with the same deficit irrigation level, while the lowest protein concentration (12.24%) was recorded at 50 ETc combined with no fertilizer. Hence, the use of 75% ETc along with 92 kg nitrogen levels per hectare could be optimal in balancing quality and pod output of green beans at Adami Tulu and surrounding areas.
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Claims 7
Claim · model-written summary
Irrigation and nitrogen interaction significantly affected pod yield.
Not reportedDirection
Verbatim
e0“the interaction between the two factors; i.e., interaction of 100% ETc and 92 kg nitrogen levels per hectare recorded the highest pod yield”
e1“the pod yield had a substantial impact”
e2“snap beans”
Claim · model-written summary
Full irrigation plus 92 kg nitrogen per hectare gave the highest pod yield, 22.69 t·ha−1.
- Taxon
- snap beanse1
- Treatment
- 100% ETc and 92 kg nitrogen levels per hectaree0
- Outcome
- pod yielde0
- Direction
- higheste0
- Value
- 22.69 t·ha−1e0
Not reportedComparator
Verbatim
e0“interaction of 100% ETc and 92 kg nitrogen levels per hectare recorded the highest pod yield (22.69 t·ha−1)”
e1“snap beans”
Claim · model-written summary
Half irrigation without nitrogen gave the lowest pod yield, 6.922 tons per hectare.
- Taxon
- snap beanse1
- Treatment
- 50% ETc and no nitrogen applicatione0
- Outcome
- overall pod yielde0
- Direction
- loweste0
- Value
- 6.922 tons per hectaree0
Not reportedComparator
Verbatim
e0“50% ETc and no nitrogen application produced the lowest amount of overall pod yield (6.922 tons per hectare)”
e1“snap beans”
Claim · model-written summary
At 75% ETc, 92 kg nitrogen per hectare gave the highest protein concentration, 17.718%.
- Taxon
- snap beanse1
- Treatment
- 75% ETc in combination with 92 kg nitrogen per hectaree0
- Outcome
- protein concentratione0
- Direction
- higheste0
- Value
- 17.718%e0
Not reportedComparator
Verbatim
e0“75% ETc in combination with 92 kg nitrogen per hectare recorded the highest protein concentration (17.718%)”
e1“snap beans”
Claim · model-written summary
The 75% ETc plus 138 kg nitrogen treatment was statistically equivalent for protein concentration.
- Taxon
- snap beanse2
- Treatment
- 138 kg nitrogen per hectare combined with the same deficit irrigation levele0
- Outcome
- protein concentratione1
- Direction
- statistically equivalente0
Not reportedComparator
Verbatim
e0“statistically equivalent to 138 kg nitrogen per hectare combined with the same deficit irrigation level”
e1“protein concentration (17.718%)”
e2“snap beans”
Claim · model-written summary
Half ETc without fertilizer gave the lowest protein concentration, 12.24%.
- Taxon
- snap beanse1
- Treatment
- 50 ETc combined with no fertilizere0
- Outcome
- protein concentratione0
- Direction
- loweste0
- Value
- 12.24%e0
Not reportedComparator
Verbatim
e0“the lowest protein concentration (12.24%) was recorded at 50 ETc combined with no fertilizer.”
e1“snap beans”
Claim · model-written summary
The authors recommend 75% ETc plus 92 kg nitrogen per hectare to balance quality and pod output.
Verbatim
e0“the use of 75% ETc along with 92 kg nitrogen levels per hectare could be optimal in balancing quality and pod output of green beans at Adami Tulu and surrounding areas.”
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