Purpose: This study provides a meta-analysis of studies that examined the effect of urea application on corn productivity. This study aimed to provide a comprehensive and robust understanding of the relationship between urea use and corn yield.
Methods: The meta-analysis process involved several steps, including determining the reference component of the search, recording and tabulating the required data, standardizing the data, and running the analysis using OpenMEE.
Results: The study found that Urea application significantly improved corn productivity, and the effect was more pronounced when urea was combined with other fertilizers. The study also found that the timing of urea application was critical, and that applying urea before planting was more effective than applying urea after planting.
Limitations: this research is limited to combined fertilization, taking advantage of favorable climatic conditions, and adopting controlled agricultural approaches such as planting in demonstration plots
Contribution: The findings of this study suggest that farmers can optimize their fertilizer management strategies by adopting recommended application rates and timing of urea application.