InfoAg 2017 Presentation
 
Presentations
Advances in VR Nutrients

Regency C
Wed, Jul 26, 2017
8:00 AM to 10:00 AM

Advances in VR Nutrients (Repeat)

Regency C
Wed, Jul 26, 2017
1:20 PM to 3:20 PM

 

Much of the phosphorus (P) fertilizer applied across the US is applied using a variable rate (VR) strategy. Often we interpolate soil P data and use standard soil test interpretations to develop VR prescriptions. We need to critically examine this approach. Can traditional soil test critical values (the soil P concentration below which we expect P fertilizer response) and fertilizer recommendation systems be used under a VR management strategy? How precise are interpolated soil test maps? These questions and others will be examined as we discuss ongoing research into VR-P.

Speaker
Josh McGrath
Associate Professor & Extension Specialist
University of Kentucky
Lexington, KY 40546-0091