"The Yield is on a mission to transform food and farming practices around the world with locally developed technology solutions," said founder and managing director Ros Harvey (pictured with Debney).
"We're growing rapidly and plan to expand globally this year, taking The Yield technology to more farms, in more countries.
"The wealth of knowledge Harry brings as board chair will be invaluable to The Yield and help us drive those ambitious growth plans at home and around the world."
He is also an independent non-executive director of online retailer Kogan.
Debney previously spent 24 years at packaging and recycling company Visy Industries, most recently as chief executive, and has also worked as assistant general manager at Queensland Fruit and Vegetable Growers.
He holds a diploma in agriculture and an honours degree in applied science from the University of Queensland. In 2001 he was awarded the university's Gatton Gold Medal that recognises "a graduate who has achieved outstanding success or honour in, or has made and continues to make, an outstanding contribution to their vocation in an area of relevance to the interests of UQ Gatton".
"I have always searched for game-changing technology and I am convinced that The Yield will make a major contribution to the future success of the global agriculture industry," said Debney.
"The agricultural industry has entered an exciting technology phase where we have an opportunity - through more effective real time measurement of key variables combined with predictive analysis - to reach new levels of crop performance, especially in terms of quality and yield."