 | Amaranth to Zai Holes, Ideas for Growing Food under difficult Conditions (Educational Concerns for Hunger Organization, 1996, 397 p.) |
 |  | 6: Soil health and plant nutrition |
|
|
|
|
| Amaranth to Zai Holes, Ideas for Growing Food under difficult Conditions (Educational Concerns for Hunger Organization, 1996, 397 p.) |
| | 6: Soil health and plant nutrition |
|
|
|
|
|