Abstract
Application of fertilizer is the most effective means to increase nutrient uptake in crop plants and improve yields and quality. A field experiment was conducted with an objective to identify which of macronutrients N, P and K are limiting maize grain and yield components in the study area during 2017/18 cropping season. The experiment was laid out in a completely randomized block design with six treatments replicated across six farmers’ fields in Kersa district, Jimma zone, south western Ethiopia. The trial consisted of six treatments, unfertilized control, PK, NK, NP, NPK and NPK+. Maize grain yield was the highest for the NPK treatment followed by NPK+ treatment but lowest for the unfertilized control and N omitted plots. In absence of N, P, and K maize grain yields were significantly lower compared to that of NPK and NPK+ treatments. Among the different treatments, NPK gave the highest grain yield (9185 kg ha-1), while the control treatment gave the lowest grain yield (1861.3 kg ha-1). Grain yield levels obtained for different fertilizer treatments were ranked as NPK>NPK+>NP>PK>NK, illustrating that N deficiency was the most yield limiting nutrient followed by P and K in order. Therefore, NPK is the most suitable balanced fertilizers as application of secondary and micronutrients did not further enhance grain yield in the study area.
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Claims 12
Claim · model-written summary
NPK produced the highest maize grain yield.
Zea maysOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Maize grain yield was the highest for the NPK treatment followed by NPK+ treatment but lowest for the unfertilized control and N omitted plots.”
Claim · model-written summary
Unfertilized control gave the lowest maize grain yield.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Maize grain yield was the highest for the NPK treatment followed by NPK+ treatment but lowest for the unfertilized control and N omitted plots.”
Claim · model-written summary
N-omitted plots were among the lowest for maize grain yield.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Maize grain yield was the highest for the NPK treatment followed by NPK+ treatment but lowest for the unfertilized control and N omitted plots.”
Claim · model-written summary
Omission of N significantly lowered maize grain yield versus NPK and NPK+.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In absence of N, P, and K maize grain yields were significantly lower compared to that of NPK and NPK+ treatments.”
t0“Maize (Zea mays L.)”
Claim · model-written summary
Omission of P significantly lowered maize grain yield versus NPK and NPK+.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In absence of N, P, and K maize grain yields were significantly lower compared to that of NPK and NPK+ treatments.”
t0“Maize (Zea mays L.)”
Claim · model-written summary
Omission of K significantly lowered maize grain yield versus NPK and NPK+.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In absence of N, P, and K maize grain yields were significantly lower compared to that of NPK and NPK+ treatments.”
t0“Maize (Zea mays L.)”
Claim · model-written summary
NPK yielded 9185 kg ha-1, the highest reported grain yield.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“NPK gave the highest grain yield (9185 kg ha-1)”
t0“Maize (Zea mays L.)”
Claim · model-written summary
The control yielded 1861.3 kg ha-1, the lowest reported grain yield.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the control treatment gave the lowest grain yield (1861.3 kg ha-1)”
t0“Maize (Zea mays L.)”
Claim · model-written summary
Fertilizer grain yields ranked NPK>NPK+>NP>PK>NK.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Grain yield levels obtained for different fertilizer treatments were ranked as NPK>NPK+>NP>PK>NK”
t0“Maize (Zea mays L.)”
Claim · model-written summary
N deficiency was the most yield limiting, followed by P and K.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“N deficiency was the most yield limiting nutrient followed by P and K in order”
t0“Maize (Zea mays L.)”
Claim · model-written summary
Secondary and micronutrients did not further enhance grain yield.
- Treatment
- secondary and micronutrientse0
- Outcome
- grain yielde0
- Direction
- did not further enhancee0
- Setting
- study areae0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“application of secondary and micronutrients did not further enhance grain yield in the study area”
t0“Maize (Zea mays L.)”
Claim · model-written summary
The authors recommend NPK as the most suitable balanced fertilizer in the study area.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“NPK is the most suitable balanced fertilizers as application of secondary and micronutrients did not further enhance grain yield in the study area”
t0“Maize (Zea mays L.)”
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