|
45 |
Organic materials and soil productivity in the Near East, 1982 |
1982 |
Report |
|
|
43 |
Organic recycling in Africa, 1980 |
1980 |
Report |
|
|
42 |
Soil survey investigations for irrigation, 1979 |
1979 |
Report |
|
|
41 |
China: azolla propagation and small-scale biogas technology, 1978 |
1978 |
Report |
|
|
40 |
China: recycling of organic wastes in agriculture, 1977 |
1977 |
Report |
|
|
39 |
Salt-affected soils and their management, 1988 |
1988 |
Report |
|
|
38 |
Soil and plant testing and analysis, 1980 |
1980 |
Report |
|
|
38 |
Soil and plant testing as a basis of fertilizer recommendations, 1980 |
1980 |
Report |
|
|
37 |
Improved use of plant nutrients, 1978 |
1978 |
Report |
|
|
35 |
Organic materials and soil productivity, 1977 |
1977 |
Report |
|
|
|