Abstract
Maize growers need balanced crop nutrition to maximize its yield potential and get the most out of their fertilizer investment. In practice, this requires making all of the required nutrients available to the maize crop by the right amount or rate. The objectives of this study was to determine optimum N, P, K and S response curve under balanced fertilization and to establish economic mixes blended fertilizers and determine soil, crop specific optimum N, P, K and S fertilizers rates for maize crop grown in Assosa areas. The experiment was conducted using randomized complete block design (RCBD) with three replications consisting of a total of 8 treatments for N, P, K and 10 treatments for S. Therefore; the result revised that the N level was highly significant (P<0.05) on grain yield. The highest grain yield (7292.5 kg ha-1) was obtained at the lowest nitrogen rate with balanced fertilizer of 46 kg N ha-1+PKSZnB while significantly the lowest grain yield (3298.6 kg ha-1) was records from control. The application of 69 kg ha-1 P resulted in grain yield increases, aboveground biomass yield was also affected in the same amount of P with balanced fertilizers having increased biomass yield with P application. Even if the ANOVA results shows significant difference on that of treated with K fertilizer, there was slight variation within treatments except the highest rates of K fertilizer. Across the S rate studies, all S rates with balanced fertilizers had a statistically significant yield increment from the control and Recommended NP. From the across-treatment yield increase, treatment 10 Kg S ha-1+NPKZnB gives maximum yield (6717.7 kg ha-1). Analyzed across S rate, the economic optimum S rate was also 10 Kg S ha-1 for the clay textured soils of Assosa.
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Claims 8
Claim · model-written summary
Nitrogen level significantly affected maize grain yield.
Zea maysNot reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the N level was highly significant (P<0.05) on grain yield”
t0“Maize”
Claim · model-written summary
A 46 kg N ha-1 balanced treatment yielded 7292.5 kg ha-1, above the control.
- Treatment
- 46 kg N ha-1+PKSZnBe0
- Outcome
- grain yielde0
- Direction
- higheste0
- Value
- 7292.5 kg ha-1e0
- Qualifier
- 3298.6 kg ha-1e0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The highest grain yield (7292.5 kg ha-1) was obtained at the lowest nitrogen rate with balanced fertilizer of 46 kg N ha-1+PKSZnB while significantly the lowest grain yield (3298.6 kg ha-1) was records from control.”
t0“Maize”
Claim · model-written summary
Application of 69 kg ha-1 P increased maize grain yield.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The application of 69 kg ha-1 P resulted in grain yield increases”
t0“Maize”
Claim · model-written summary
Phosphorus application increased aboveground biomass yield.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“aboveground biomass yield was also affected in the same amount of P with balanced fertilizers having increased biomass yield with P application”
t0“Maize”
Claim · model-written summary
Potassium fertilizer treatments differed significantly but varied only slightly except at the highest rates.
- Treatment
- K fertilizere0
- Outcome
- variation within treatmentse0
- Direction
- slighte0
- Qualifier
- except the highest rates of K fertilizere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“ANOVA results shows significant difference on that of treated with K fertilizer, there was slight variation within treatments except the highest rates of K fertilizer”
t0“Maize”
Claim · model-written summary
All sulfur rates with balanced fertilizer increased yield versus control and recommended NP.
- Treatment
- all S rates with balanced fertilizerse0
- Outcome
- yielde0
- Direction
- incremente0
- Comparator
- control and Recommended NPe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“all S rates with balanced fertilizers had a statistically significant yield increment from the control and Recommended NP”
t0“Maize”
Claim · model-written summary
The 10 Kg S ha-1+NPKZnB treatment produced maximum yield of 6717.7 kg ha-1.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“treatment 10 Kg S ha-1+NPKZnB gives maximum yield (6717.7 kg ha-1)”
t0“Maize”
Claim · model-written summary
Economic optimum sulfur rate was 10 Kg S ha-1 on Assosa clay soils.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the economic optimum S rate was also 10 Kg S ha-1 for the clay textured soils of Assosa”
t0“Maize”
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