doug pow biochar cows dung beetles avocado trials Published 9 years ago • 2.1K plays • Length 9:59 Download video MP4 Download video MP3 Similar videos 5:30 biochar and dung beetles with doug pow 18:55 composting with biochar 8:28 an alternative to composting manure - biochar 0:58 making biochar with chicken and duck manure 0:56 feedchar