Abstract
Low wheat productivity in Ethiopia is largely attributed to nutrient imbalances and the widespread use of blanket fertilizer recommendations that do not account for site-specific soil conditions. To identify the most yield-limiting nutrients for wheat (Triticum aestivum L.) production, a field experiment using nutrient omission trials was conducted during the 2021 cropping season at eight farmers’ fields in Wera Dijo District, Halaba Zone, central Ethiopia. The soils across the study sites had neutral pH (6.1–7.0), medium to high organic carbon content (1.85–4.19%), and low to medium available phosphorus (3.10–10.94 mg kg⁻1). The experiment was arranged in a randomized complete block design with ten treatments, including a complete nutrient treatment, NP treatment, negative control, and single-nutrient omission treatments. Grain yield, biomass yield, and yield components were analyzed using a linear mixed-effects model, with nutrient treatments as fixed effects and farms and blocks within farms as random effects. Nutrient treatments significantly affected grain yield, biomass, and yield components (p < 0.0001). Omission of nitrogen or phosphorus caused significant reductions in all measured parameters, with nitrogen omission resulting in the greatest yield loss, comparable to the negative control, indicating that nitrogen was the most limiting nutrient. In contrast, omission of potassium, sulfur, zinc, or boron had no significant effect on wheat yield, suggesting that these nutrients are not currently limiting in the study area. Grain yields under the NP treatment were statistically comparable to those under the complete treatment. These results highlight nitrogen and phosphorus as the primary yield-limiting nutrients for wheat production in the study area and demonstrate the importance of site-specific nutrient management. Targeted application of N and P fertilizers can improve wheat productivity and nutrient use efficiency in Halaba and similar agro-ecological zones.
Abstract from the paper’s OpenAlex record; open copy licensed cc-by-nc-nd. 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 11
Claim · model-written summary
Nutrient treatments significantly affected wheat grain yield, biomass, and yield components.
- Taxon
- wheat (Triticum aestivum L.)
Triticum aestivumt0 - Treatment
- Nutrient treatmentse0
- Outcome
- grain yield, biomass, and yield componentse0
- Value
- p < 0.0001e0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nutrient treatments significantly affected grain yield, biomass, and yield components (p < 0.0001)”
t0“Identifying limiting nutrients for wheat (Triticum aestivum L.) production in Halaba, Central Ethiopia”
Claim · model-written summary
Nitrogen omission significantly reduced all measured wheat parameters.
- Taxon
- wheat (Triticum aestivum L.)Triticum aestivumt0
- Treatment
- Omission of nitrogene0
- Outcome
- all measured parameterse0
- Direction
- reductionse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Omission of nitrogen or phosphorus caused significant reductions in all measured parameters”
t0“Identifying limiting nutrients for wheat (Triticum aestivum L.) production in Halaba, Central Ethiopia”
Claim · model-written summary
Phosphorus omission significantly reduced all measured wheat parameters.
- Taxon
- wheat (Triticum aestivum L.)Triticum aestivumt0
- Treatment
- phosphoruse0
- Outcome
- all measured parameterse0
- Direction
- reductionse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Omission of nitrogen or phosphorus caused significant reductions in all measured parameters”
t0“Identifying limiting nutrients for wheat (Triticum aestivum L.) production in Halaba, Central Ethiopia”
Claim · model-written summary
Nitrogen omission produced the greatest yield loss, comparable to the negative control.
- Taxon
- wheat (Triticum aestivum L.)Triticum aestivumt0
- Treatment
- nitrogen omissione0
- Outcome
- yield losse0
- Direction
- greateste0
- Comparator
- negative controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“nitrogen omission resulting in the greatest yield loss, comparable to the negative control”
t0“Identifying limiting nutrients for wheat (Triticum aestivum L.) production in Halaba, Central Ethiopia”
Claim · model-written summary
Nitrogen was identified as the most limiting nutrient.
- Taxon
- wheat (Triticum aestivum L.)Triticum aestivumt0
- Outcome
- most limiting nutriente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“indicating that nitrogen was the most limiting nutrient”
t0“Identifying limiting nutrients for wheat (Triticum aestivum L.) production in Halaba, Central Ethiopia”
Claim · model-written summary
Potassium omission had no significant effect on wheat yield.
- Taxon
- wheat (Triticum aestivum L.)Triticum aestivumt0
- Treatment
- omission of potassiume0
- Outcome
- wheat yielde0
- Direction
- no significant effecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“omission of potassium, sulfur, zinc, or boron had no significant effect on wheat yield”
t0“Identifying limiting nutrients for wheat (Triticum aestivum L.) production in Halaba, Central Ethiopia”
Claim · model-written summary
Sulfur omission had no significant effect on wheat yield.
- Taxon
- wheat (Triticum aestivum L.)Triticum aestivumt0
- Treatment
- sulfure0
- Outcome
- wheat yielde0
- Direction
- no significant effecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“omission of potassium, sulfur, zinc, or boron had no significant effect on wheat yield”
t0“Identifying limiting nutrients for wheat (Triticum aestivum L.) production in Halaba, Central Ethiopia”
Claim · model-written summary
Zinc omission had no significant effect on wheat yield.
- Taxon
- wheat (Triticum aestivum L.)Triticum aestivumt0
- Treatment
- zince0
- Outcome
- wheat yielde0
- Direction
- no significant effecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“omission of potassium, sulfur, zinc, or boron had no significant effect on wheat yield”
t0“Identifying limiting nutrients for wheat (Triticum aestivum L.) production in Halaba, Central Ethiopia”
Claim · model-written summary
Boron omission had no significant effect on wheat yield.
- Taxon
- wheat (Triticum aestivum L.)Triticum aestivumt0
- Treatment
- borone0
- Outcome
- wheat yielde0
- Direction
- no significant effecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“omission of potassium, sulfur, zinc, or boron had no significant effect on wheat yield”
t0“Identifying limiting nutrients for wheat (Triticum aestivum L.) production in Halaba, Central Ethiopia”
Claim · model-written summary
NP treatment grain yield was statistically comparable to complete nutrient treatment.
- Taxon
- wheat (Triticum aestivum L.)Triticum aestivumt0
- Treatment
- NP treatmente0
- Outcome
- Grain yieldse0
- Direction
- statistically comparablee0
- Comparator
- complete treatmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Grain yields under the NP treatment were statistically comparable to those under the complete treatment”
t0“Identifying limiting nutrients for wheat (Triticum aestivum L.) production in Halaba, Central Ethiopia”
Claim · model-written summary
Targeted nitrogen and phosphorus fertilizer application may improve wheat productivity and nutrient use efficiency.
- Taxon
- wheat (Triticum aestivum L.)Triticum aestivumt0
- Outcome
- Targeted application of N and P fertilizerse0
- Setting
- Halabae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Targeted application of N and P fertilizers can improve wheat productivity and nutrient use efficiency in Halaba and similar agro-ecological zones”
t0“Identifying limiting nutrients for wheat (Triticum aestivum L.) production in Halaba, Central Ethiopia”
The same questions in other papers
boron atom · yield · Triticum aestivum (wheat)Results differ
13 papers in the same direction as this paper · 62 in the opposite direction
This paper is about lacking the nutrient, so it counts the other way round here.
- positive
- positive
- positive
72 papers more in this group
See all 76 papers →sulfur atom · yield · Triticum aestivum (wheat)Results differ
23 papers in the same direction as this paper · 124 in the opposite direction
This paper is about lacking the nutrient, so it counts the other way round here.
- positive
- positive
- positive
144 papers more in this group
See all 148 papers →zinc atom · yield · Triticum aestivum (wheat)Results differ
54 papers in the same direction as this paper · 456 in the opposite direction
This paper is about lacking the nutrient, so it counts the other way round here.
- positive
- positive
- positive
507 papers more in this group
See all 511 papers →potassium · yield · Triticum aestivum (wheat)Positive and negative results
29 papers in the same direction as this paper · 227 in the opposite direction
This paper is about lacking the nutrient, so it counts the other way round here.
- positive
- positive
- positive
253 papers more in this group
See all 257 papers →nanoparticle · yield · Triticum aestivum (wheat)Positive and negative results
17 papers in the same direction as this paper · 242 in the opposite direction
- positive
- positive
- positive
256 papers more in this group
See all 260 papers →nitrogen · yield · Triticum aestivum (wheat)Positive and negative results
1,736 papers in the same direction as this paper · 285 in the opposite direction · 39 reporting no difference from an alternative
This paper is about lacking the nutrient, so it counts the other way round here.
- negative
- negative
- negative
2,057 papers more in this group
See all 2,061 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.