Abstract
Abstract Food crop productivity is still low because of the decline of soil fertility in Ethiopia, particularly in north‐western Amhara. Fine‐tuning the source and rate of nutrients is required to solve soil fertility problems along landscape positions. Therefore, this study was initiated to investigate the need to apply selected nutrients to tef and wheat in acidic soils. This nutrient omission study was conducted in 74 farmers’ fields of Gozamen and Machakel districts. The omitted nutrients were sulfur (S), zinc (Zn), and boron (B). Potassium (K) was added, consisting of N, P, K, S, Zn, and B (All+K). Nitrogen plus phosphorus (NP) and no fertilizer treatments were used as positive and negative controls, respectively. Furthermore, 50% and 150% of the All+K treatments were also included. The finding revealed that the application of different nutrient types at variable rates had a significant role in the grain and biomass yield of both test crops in the acidic soils. No tef yield and the lowest yield of bread wheat were obtained from the no fertilizer application treatment. The application of All+K had no significant yield advantage compared to NP fertilizer alone. This implies that N and P are the most yield‐limiting nutrients to produce tef and bread wheat, whereas KSZnB nutrients are not yield limiting. Therefore, refining the rates of N and P in acidic soils is needed for the economical use of fertilizers. Finally, applying blended fertilizers without empirical evidence is not recommended for smallholder farmers in the study area.
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Claims 10
Claim · model-written summary
Nutrient application rates and types significantly affected grain and biomass yield of tef.
Not reportedTaxonComparatorDirection
Verbatim
e0“application of different nutrient types at variable rates had a significant role in the grain and biomass yield of both test crops in the acidic soils”
Claim · model-written summary
Nutrient application rates and types significantly affected grain and biomass yield of wheat.
Not reportedTaxonComparatorDirection
Verbatim
e0“application of different nutrient types at variable rates had a significant role in the grain and biomass yield of both test crops in the acidic soils”
Claim · model-written summary
No tef yield was obtained without fertilizer.
- Taxon
- tef
Eragrostis tefe0 - Treatment
- no fertilizer application treatmente0
- Outcome
- tef yielde0
- Direction
- Noe0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“No tef yield and the lowest yield of bread wheat were obtained from the no fertilizer application treatment”
Claim · model-written summary
The no-fertilizer treatment produced the lowest bread wheat yield.
- Taxon
- bread wheat
Triticum aestivume0 - Treatment
- no fertilizer application treatmente0
- Outcome
- yielde0
- Direction
- loweste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“No tef yield and the lowest yield of bread wheat were obtained from the no fertilizer application treatment”
Claim · model-written summary
All+K gave no significant yield advantage over NP fertilizer.
- Treatment
- All+Ke0
- Outcome
- yield advantagee0
- Direction
- no significant yield advantagee0
- Comparator
- NP fertilizer alonee0
Not reportedTaxon
Verbatim
e0“The application of All+K had no significant yield advantage compared to NP fertilizer alone”
Claim · model-written summary
The authors identify nitrogen and phosphorus as the most yield-limiting nutrients for tef.
- Taxon
- tefEragrostis tefe0
- Treatment
- N and Pe0
- Outcome
- most yield‐limiting nutrientse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“N and P are the most yield‐limiting nutrients to produce tef and bread wheat”
Claim · model-written summary
The authors identify nitrogen and phosphorus as the most yield-limiting nutrients for bread wheat.
- Taxon
- bread wheatTriticum aestivume0
- Treatment
- N and Pe0
- Outcome
- most yield‐limiting nutrientse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“N and P are the most yield‐limiting nutrients to produce tef and bread wheat”
Claim · model-written summary
KSZnB nutrients were interpreted as not yield limiting.
Not reportedTaxon
Verbatim
e0“KSZnB nutrients are not yield limiting”
Claim · model-written summary
The authors recommend refining nitrogen and phosphorus rates in acidic soils.
- Outcome
- refining the rates of N and P in acidic soilse0
Not reportedTaxon
Verbatim
e0“refining the rates of N and P in acidic soils is needed for the economical use of fertilizers”
Claim · model-written summary
The authors advise against blended fertilizer application without empirical evidence for local smallholders.
- Outcome
- applying blended fertilizers without empirical evidence is not recommendede0
Not reportedTaxon
Verbatim
e0“applying blended fertilizers without empirical evidence is not recommended for smallholder farmers in the study area”
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