71 / | HD | CHEMISTRY: FERTILIZERS |
1 | DF | PROCESSES AND PRODUCTS {5} |
11 | .~ Organic material-containing {6} | |
12 | DF | .~.~> From sewage or night soil {1} |
14 | DF | .~.~> From garbage |
15 | DF | .~.~> From animal matter {6} |
23 | DF | .~.~> From vegetation {1} |
25 | DF | .~.~> From industrial wastes {1} |
27 | DF | .~.~> From synthetic material {1} |