Agnihotra is a Vedic Hindu practise using fire and ash, which claims to heal the atmosphere and replenish the nutrients necessary for healthy, organically grown crops. Homa Organic Farming is holistic healing for agriculture and can be used in conjunction with any good organic farming system.
To find out all about it, here is an Agnihotra workshop webinar recording from the Homa Therapy Association of Australia. It begins with the fire ritual, so jump to around 8 mins 30 secs for an overview and instructional video.
Thanks to Janette Perrett for the contribution. She has her copper vessels and cow dung at the ready!