Better Farming Series 31 - Biogas: What it is; How it is made; How to use it (FAO, 1984, 52 p.)

Better Farming Series 31 - Biogas: What it is; How it is made; How to use it (FAO, 1984, 52 p.)

		(introduction...)
		Preface
		Introduction
		How to build a small biogas unit
		Waste materials
		Time
		Cold weather protection
		Stirring the waste mixture
		When the gas is made
		Using your biogas
		Using the fertilizer
		Taking care of your biogas unit
		Making more biogas