4R Educational Modules: Site Specific Nutrient Mangement

Applying the right nutrient source, at the right rate, at the right time, in the right place is essential to nutrient stewardship and is the core of the 4Rs. To achieve this goal, a team of experts has created the following learning modules.  An essential component of these learning modules is to provide information about the basic components of soil fertility and nutrient best management practices. Topics include an explanation of the key components of plant nutrition in relation to selection of fertilizer best management practices addressing the 4Rs. The modules address the macro- and micronutrients as well as soil sampling and integrated economic and environmental issues relative to nutrient management.

After using these materials, please click here to give us your feedback through a brief survey. 

CCAs can click here to take a quiz on the modules and apply for CEUs.  Meetings and events offering additional CEUs can be found here on the CCA calendar.  

The materials included in these modules were authored by Agustin Pagani, John Sawyer, and Antonio Mallarino; Iowa State University Department of Agronomy. Materials include a chapter and an automated presentation for each topic.

Module 1: Overview of Soil Fertility
Module 2: Nitrogen Management
Module 3: Phosphorus Management
Module 5: Sulfur Management
Module 6: Calcium and Magnesium Management
Module 4: Potassium Management
Module 5: Micronutrient Management
Module 8: Soil pH and Lime Management
Module 9: Soil Sampling
Module 10: Economies of Nutrient Management and Environmental Issues