| |
| 27 |
Organic materials as fertilizers, 1975 |
1975 |
Report |
|
|
| 26 |
Planning and organization of fertilizer development in Africa, 1975 |
1975 |
Report |
|
|
| 25 |
Sandy soils, 1975 |
1975 |
Report |
|
|
| 23 |
Management properties of ferralsols, 1974 |
1974 |
Report |
|
|
| 22 |
Approaches to land classification, 1974 |
1974 |
Report |
|
|
| 21 |
Calcareous soils, 1973 |
1973 |
Report |
 |
|
| 20 |
Fertilizer legislation, 1973 |
1973 |
Report |
|
|
| 19 |
Soil survey interpretation for engineering purposes, 1973 |
1973 |
Report |
|
|
| 18 |
Guide to the calibration of soil tests for fertilizer recommendations, 1973 |
1973 |
Report |
|
|
| 17 |
Trace elements in soils and agriculture, 1972 |
1972 |
Report |
|
|
|
