 | Better Farming Series 31. Biogas: What it is; How it is Made; How to Use it (FAO Better Farming Series, 1984) |
 |  | (introduction...) |
| | Preface |
|  | Introduction |
| | (introduction...) |
| | Biogas |
| | How is biogas made? |
| | How big should your biogas unit be? |
| | How to build a small biogas unit |
| | (introduction...) |
| | You will need |
| | Where to put your biogas unit |
| | Building the unit |
| | Testing for leaks |
| | Waste materials |
| | What waste materials to use |
| | How to use them |
| | Making a starter |
| | Putting waste into your biogas unit |
| | 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 |
Using the fertilizer
115. You have already learned that when all the gas has been made, the material that is left in your biogas unit is a very rich fertilizer.
116. It does not have a bad smell, and the parasites that were in
the animal wastes and the weed seeds that were in the plant wastes are no longer
harmful.
117. You can spread this new fertilizer on your fields to help your
plants grow well.
Put fertilizer everywhere
118. Do not put the fertilizer all in one place. Put a little of it everywhere on your fields. In this way, all of your plants will grow better.
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