Nutrient management topics
25. Minerals to crop nutrients – The fertilizer industry (1.0 NM)
Robert Mullen, Director of Agronomy, Nutrien, Wooster, OH
This presentation will focus on a brief history of the fertilizer industry, where the mineral deposits exist globally, and how minerals are processed to be familiar fertilizer products. This presentation will also discuss the global nature of the fertilizer industry, and how the changing global ag landscape is affecting farmers in the United States.
Session J - Thursday, 10:10 AM - 11:00 AM
Session K - Thursday, 11:10 AM - 12:00 PM
26. Fertilizer application technology (1.0 NM)
Matt Darr, professor, Agricultural and Biosystems Engineering, Iowa State University, Ames, IA
Providing adequate nutrients evenly and consistently is critical to the success of a crop production system. The quality of fertilizer application is a key factor to maximizing crop yields. This presentation will cover the latest in fertilizer application systems, provide tips to maximize fertilizer application success, and will highlight the growing use of imagery in evaluating fertilizer application quality.
Session A - Wednesday, 9:00 AM - 9:50 AM
Session B - Wednesday, 10:00 AM - 10:50 AM
27. Driving at night wearing sunglasses: Will corn nitrogen recommendations ever get better? (1.0 NM)
Newell Kitchen, soil scientist, USDA-ARS, University of Missouri, Columbia, MO
For both economic and environmental reasons, corn nitrogen recommendations deserve greater attention. While some tools for making rate recommendations have performed well in some years and on some soils, when tested over diverse environmental conditions and management, many tools often miss. This presentation will share the message of historic and current N recommendation tools for corn, as well as address how tools address spatial and temporal factors variation in crop N need.
Session F - Wednesday, 3:10 PM - 4:00 PM
Session G - Wednesday, 4:10 PM - 5:00 PM
28. Nitrogen use in corn – What long-term data tells us (1.0 NM)
John Sawyer, professor and Extension soil fertility specialist, Agronomy, Iowa State University, Ames, IA
Nitrogen management continues to be an important management component for high yield corn production. Research with long-term trials provides interesting insight into many concepts such as yield response to nitrogen across time, optimal nitrogen rate, nitrogen rate and yield stability, residual response to historical applications, soybean yield effect, and rotation yield comparison.
Session M - Thursday, 2:00 PM - 2:50 PM
Session N - Thursday, 3:00 PM - 3:50 PM
29. Phosphorus and potassium fertilizer placement options when crop prices are low (1.0 NM)
Antonio Mallarino, professor, Agronomy, Iowa State University, Ames, IA
Crop prices are low and farmers are looking for ways to reduce inputs. Farmers and crop advisers are asking what application timing and placement methods allow for a reduction of phosphorus and potassium rates while maintaining high yields and the profitability of corn and soybean production. The presentation will share results of extensive Iowa research on preplant placement methods for granulated fertilizers and ongoing research that is assessing the value of sidedressed fluid potassium fertilizer.
Session H - Thursday, 8:00 AM - 8:50 AM
Session I - Thursday, 9:00 AM - 9:50 AM
30. New opportunities for soil mapping with spatial modeling (1.0 NM)
Bradley Miller, assistant professor, Agronomy, Iowa State University, Ames, IA; Yones Khaledian, Ph.D candidate, Agronomy, Iowa State University, Ames, IA
Current Soil Survey maps are built on technologies that were developed a century ago. Soil sampling for managing fertility can be expensive. What can modern geospatial technologies do to help? Spoiler: A lot.
Session D - Wednesday, 1:00 PM - 1:50 PM
Session E - Wednesday, 2:00 PM - 2:50 PM