Corn and Soybean Response to Sulfur: What we know and what we're working on (shortened to 59' 5/16)

***Editor's Note***
This video was orginally posted on 5/8/2025. It was shortened to under 1 hour and reposted on 6/16/2025.

These training videos were created for Purdue Extension Faculty and staff given by specialists in their fields of expertise to go beyond what one may typically find. Please share and and like if you find these videos of value for your operation.

This training opportunity was brought to us by Purdue Corn Agronomist Dr. Dan Quinn and Purdue Soybean Agronomist Dr. Shaun Casteel.

Edited by Hugh Kennedy and Scott Gabbard

Timeline: Corn and Soybean Response to Sulfur

00:05 Intro by Jeff Burbrink Purdue Extension field crops focus team co-chair
-Corn-
01:08 Dan Quinn, Purdue Corn Agronomist
01:37 Why do we need to apply sulfur now in some fields?
02:31 Why is sulfur important for corn production?
04:35 Plant requirements vs soil availability
05:50 Deficiency symptomology
8:27 Yield, stover production and C:S relationship
12:42 Cereal rye and sulfur application response (preliminary)
14:26 Yield response and sulfur source
17:13 R1 sulfur threshold response to application
17:34 Take-home points
-Soybeans-
22:31 Sulfur deficiencies in soybeans: classic and induced factors
25:58 Symptomology
29:35 Effects on nodulation
30:18 General background S mineralization rates and S immobilization
32:50 How much S does soybean need?
35:00 Sulfur management considerations
37:03 S critical levels
38:45 Other considerations
40:10 Situational sulfur deficiency (planting dates and S formulations)
45:13 S effects on N fixation
47:44 Sulfur availability and carbon management
51:36 Sulfur availability and disease management (preliminary)
53:32 High yield considerations
54:21 Soybean QnA
58:36 Crop and Weather Update reminder

Special Thank You to Indiana Soybean, Illinois Soybean, United Soybean and Indiana Corn for making these research projects possible.