What question did this study set out to answer?

The study aims to assess the impact of NPSZnB fertilizer rates on maize yield, nutrient uptake, and economic viability in Ethiopia.

Evaluation of Blended Fertilizer (NPSZnB) Rates on Yield, Nutrient Uptake, and Economic Feasibility of Maize ( Zea mays L.) in Kolla Temben, Ethiopia

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Evaluates NPSZnB fertilizer effects on maize yield and nutrient uptake in Ethiopia, suggesting optimal application rates for better productivity.

The study aims to assess the impact of NPSZnB fertilizer rates on maize yield, nutrient uptake, and economic viability in Ethiopia.
Conducted experiments with six levels of NPSZnB fertilizer in a randomized complete block design.
Measured outcomes including plant height, ear length, grain yield, and biomass yield during the 2019 and 2020 cropping seasons.
Analyzed economic returns associated with different application rates.
Significant increases in maize yield and biomass were observed with NPSZnB rates from 150 to 250 kg·ha −1.
Optimal nutrient uptake for nitrogen and phosphorus occurred with maximum NPSZnB and recommended DAP application.
A marginal return of 529% was recorded for the application of 150 kg NPSZnB ha −1.

Meresa et al. (2026) studied this question.

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Evaluates NPSZnB fertilizer effects on maize yield and nutrient uptake in Ethiopia, suggesting optimal application rates for better productivity.