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Efficacy of Variable Rate Soil-applied Herbicides Based on Soil Electrical Conductivity and Organic Matter Differences

Published online by Cambridge University Press:  01 June 2017

G. J. Gundy ,
J. A. Dille  and
A. R. Asebedo
G. J. Gundy*
Affiliation:
Department of Agronomy, Kansas State University, Manhattan, Kansas, 66502, USA
J. A. Dille
Affiliation:
Department of Agronomy, Kansas State University, Manhattan, Kansas, 66502, USA
A. R. Asebedo
Affiliation:
Department of Agronomy, Kansas State University, Manhattan, Kansas, 66502, USA
*
† Email: ggundy@ksu.edu
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Abstract

Soil application of herbicides for preemergence (PRE) weed control in grain sorghum is vital to control weeds. Efficacy of soil-applied herbicides is impacted by herbicide adsorption which is influenced by soil organic matter (SOM) and texture. With precision agriculture technologies, variable rate applications (VRA) can be utilized to maximize herbicide effectiveness. In 2016, algorithms were developed for two locations to use VRA of two tank mixed herbicides based on SOM and soil electrical conductivity (EC) collected by a Veris MSP3 system. Drone imagery provided an effective way to evaluate the efficacy of herbicide applications along with visual assessment. VRA applications of herbicide tank mixes provided equal weed control compared to flat rate applications.

Keywords

weed managementherbicide algorithmVerisweed mappingsoil variability
Type
Crop Protection
Information
Advances in Animal Biosciences , Volume 8 , Special Issue 2: Papers presented at the 11th European Conference on Precision Agriculture (ECPA 2017), John McIntyre Centre, Edinburgh, UK, July 16–20 2017 , July 2017 , pp. 277 - 282
Copyright
© The Animal Consortium 2017 

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