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InfoAg 2014 Session

Repeat: Precision K Management
Moderator : Lara Moody
Date/Time : Tuesday, July 29, 2014 | 4:30pm - 5:20pm
Room : Grand Ballroom
Speaker
Potash Corporation of Saskatchewan
944 Country Club Dr.
Wooster, 44691
330-601-0396

Biography :
Dr. Robert Mullen is the Director of Agronomy with Potash Corporation of Saskatchewan. Dr. Mullen joined PCS in June of 2011. Prior to joining PCS, he was an Associate Professor of Soil Fertility and Nutrient Management at Ohio State University/Ohio Agricultural Research and Development Center (OARDC). Dr. Mullen received his B.S. in Ag Business at Cameron University in Lawton, Oklahoma in 1998. Dr. Mullen earned his M.S. in Plant and Soil Science and Ph.D. in Soil Science from Oklahoma State University in 2001 and 2003, respectively. Dr. Mullen has authored/co-authored 38 peer reviewed journal articles, 2 book chapters, and over 200 extension publications/extension bulletins.

Spatial and Temporal Potassium Management

This presentation will focus on how soil test potassium changes both spatially and temporally.  Factors contributing to spatial and termporal variation of soil test potassium will presented, and most importantly, how crop advisors can guide nutrient rate and placement decisions considering the uncertainty. 

 

Speaker
Soil and Crop Sciences Dept
Fort Collins, 80523
(970) 686-5702

Biography :
Robert Miller was born in 1955 at Gretna, Nebraska, and grew up on a grain farm in the east central part of the state. After receiving his B.S. degree in 1978, and MS in 1981 at the University of Nebraska, he was employed by Texas A&M University as Research Technician. In 1988 he earned his Ph.D. degrees at Montana State University in soil fertility and chemistry. From 1988 to 1997, he was with the University of California Davis Cooperative Extension service where he served as extension Soil Specialist and Director of the Division of Agriculture and Natural Resources Diagnostic Laboratory. He joined the faculty of Colorado State University in 1997 as an affiliate Professor in Soils and Crop Sciences, where he was a leader in the development of the North American Proficiency Testing program, which provides proficiency evaluation samples to soil testing laboratories. In 1998 he founded laboratory proficiency programs for golf course root zones, compost and for the US-EPA livestock bio-solids. Dr. Miller conducts lab workshops annually and continues to conduct research into soil analysis and fertility. He founded the Agricultural Laboratory Proficiency Program in 2006 and is widely known for encouraging the improvement of methods of soil sampling, soil test methods and testing.

Potassium Soil Stratification

Over the past 30 years tillage practices in the Midwest grain production systems have shifted from intensively tilled systems to minimum and no-till cropping systems.  As a consequence of crop residues remaining at or near the surface, there is increasing stratification of soil nutrients.  Results from recent corn fertility research across six Midwestern states will be presented on pH, P and K soil profile stratification with emphasis on soil potassium.  Nutrient management in light of soil stratification will be discussed.

 

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