|
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 |
|
|
16 |
Effects of intensive fertilizer use on the human environment, 1972 |
1972 |
Report |
|
|
|