Purdue University | Indiana CCA

Proceedings 2008

Indiana Certified Crop Adviser Conference


Corn Ear Development & Diagnostics

Arrested ear development problems have been more prevalent in recent years, seemingly related to the increased frequency of post-emergence pesticide applications to corn. An understanding of the physiological steps associated with ear development and ear size determination can help us sort through the possible causes of arrested ear development.


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Robert (Bob) NielsenProfessor of Agronomy
Purdue University

I am a Professor of Agronomy at Purdue University with major responsibilities for Extension education in corn management systems for the state of Indiana. Originally from Nebraska, I joined the Agronomy staff at Purdue in 1982 after obtaining M.S. and Ph.D. degrees from the University of Minnesota. My current field research involves investigations into the effects of uneven plant spacing on corn grain yield, the potential for using crop canopy sensors to estimate plant N status, and the productive utilization of site-specific crop management tools. One of my major Extension activities is my ongoing development of Web-based corn information sites. My two most popular Web sites are the Corn Growers' Guidebook (http://www.kingcorn.org) and the Chat ‘n Chew Café (http://www.kingcorn.org/cafe).