"Students in the 1970s were very radical. They weren't forced to be organic. What we were doing had to be integrated into the general teaching. The BHU was for the teaching and demonstration of holistic environmental aspects. It was based on good scientific principles, not muck and mystery."
The BHU is celebrating 40 years of organic status this year. It has grown from an area for teaching and demonstration based on a holistic organic philosophy and historic research, to a charitable trust which now incorporates a training college, the Future Farming Centre and the BHU Farm.
Mr Crowder acknowledges the hard work put in by volunteers and students, some through the WWOOF (Willing Workers on Organic Farms) scheme, saying the BHU would not exist without their contribution.
"Our research and the students we taught were the foundation for the future of organics in New Zealand. We produced some really excellent students of organic philosophy who are today leading the organic movement."
After Mr Crowder's retirement at the end of the 1990s, and a brief hiatus in which the future of the BHU was uncertain, it was re-launched in 2001 as the BHU Organics Trust, a joint venture between Lincoln University and the New Zealand Organic Movement, dedicated to providing education, training and research in organic, ecological, permanent and related agricultures and horticultures.
Mr Crowder still teaches at the BHU, mainly on its history, and is active as a mentor for organic growers.
The BHU has community gardens to encourage members of the community to grow their own organic food on a certified organic farm in a supportive environment of like-minded gardeners.