Welcome to Holden Research and Consulting! Holden Research and Consulting is owned and operated by David Holden. David has over 35 years of experience as an agronomist and Pest Control Advisor (PCA) and has worked with over 100 crops. He conducts many field research projects every year for a variety of agricultural manufacturers, and has completed over 1000 of these projects to date. He also consults extensively with growers on pest and nutrient management issues to increase their production yields. David is an experienced public speaker, has served on several ag related boards, worked with numerous commissions, and has traveled throughout the country and abroad to present his research.