The Role of Cation Exchange in Nutrient Management

Cristie Preston, Ph.D.

Cristie Preston

Cristie Preston, Ph.D.

Nutrien

Senior Agronomist

Agriculture has always been an integral part of Dr. Cristie Preston’s life. She grew up in southwest Virginia and had interest in crop and animal agriculture since an early age. Once she began college, she initially chose to study animal science but switched to soil science. Dr. Preston attributes her decision partly to an influential professor who told her, “You can’t understand animals until you understand what they eat.” She received a Bachelor of Science degree in animal science and a Master of Science degree in crop and soil environmental science from Virginia Tech. Dr. Preston holds a Ph.D. in agronomy, focusing on soil fertility from Kansas State University. While completing her advanced degrees, Dr. Preston conducted more than six years of field and lab research. Dr. Preston has experience in laboratory research measuring volatility loss from urea-based fertilizers. Her field research has focused on phosphorus availability and the interactions with tillage and placement. She also has extensive experience in working with large data sets and analysis. Her main priority is helping growers to identify yield-limiting factors and fix those issues as cost efficiently as possible.

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Cation Exchange Capacity (CEC) is a basic soil concept that can play a major role in nutrient management. Soils naturally carry a net negative charge that holds cations in an exchangeable form. In general, an increase in clay and organic matter, the CEC increases and the total cations that can be held. What does this mean for fertilizer and other management practices? Watch the recording of this webinar by Nutrien Senior Agronomist Dr. Cristie Preston to gain knowledge about soil CEC to can help inform your nutrient management decisions to maximize fertilizer inputs.

This webinar is approved for one CEU credit. To earn the credit, watch the entire webinar and complete the quiz. At the start of the quiz fill out the section with your full name and CCA member number to ensure proper tracking. We will then submit the completed information on your behalf. Submissions will be sent at the end of each month.