The purpose of this study is to compare multiple rates of sulfur, applied at various growth stages in a soybean-after-soybean rotation, to determine their impact on yield and profitability.

2019 Multi-Location Soybean Sulfur Rate and Timing Study - Soybean-After-Soybean

Among its many roles, sulfur can increase nitrogen uptake by improving nodule performance and efficiency. The highest yield gain occurred when the sulfur was applied at V4, which is when nodules are beginning to become active on the roots.

62 lb. AMS (Granular) Pre-Emerge, 21 lb. AMS (Spray Grade) @ V4, 21 lb. AMS (Spray Grade) @ R3, 21 lb. AMS (Spray Grade) @ V4 + 21 lb. AMS (Spray Grade) @ R3

2021 Iowa Soybean SINGULATION STUDY 15 IN. ROWS

2021 Iowa Soybean STARTER FERTILIZER STUDY 2X2X2

Sulfur Rate and Timing Study

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