Nitrogen and Sulfur Fertilization’s Effect on Soybean Quality and Yield in Kansas

Authors

Yuri A. B. Gross, Kansas State University
Luiz Felipe A. Almeida, Kansas State University
Ignacio Antonio Ciampitti, Kansas State UniversityFollow

Keywords

soybean, protein, yield, sulfur, nitrogen

Abstract

This study evaluates the effects of nitrogen (N) and sulfur (S) fertilization on soybean yield and quality. Over three years (2021-2023), nine site-year studies in Kansas tested five fertilization strategies, including Check (no fertilization), S (30.3 lbs S ac^-1), N (26.8 lbs N ac^-1), NS (26.8 lbs N ac^-1 + 30.3 lbs S ac^-1), and Full (30.3 lbs S ac^-1 + 299.8 lbs N ac^-1). Seed yield was recorded, and the seeds were analyzed for protein content. Weather data was summarized into four growth periods. There were no yield or protein content differences. Seed yield and protein showed positive correlation with soil-N content, and with precipitation and average temperature from flowering to full-pod phenological stage. The study suggests that current N₂-fixation and soil-N contributions are adequate for optimal growth, pointing toward the importance of site-specific management.

Recommended Citation

Gross, Yuri A. B.; Almeida, Luiz Felipe A.; and Ciampitti, Ignacio Antonio (2024) "Nitrogen and Sulfur Fertilization’s Effect on Soybean Quality and Yield in Kansas," Kansas Agricultural Experiment Station Research Reports: Vol. 10: Iss. 3. https://doi.org/10.4148/2378-5977.8591