 |  | | |
  | Southern Latin America |
| |
|
|  |
  | Western Canada |
| |
|
|  |
  | Western U.S. |
| |
|
|  |
 | sandy soils |
| |
|
|  |
 | soil acidity and liming |
| |
|
|  |
 | soil testing |
| |
|
|  |
  | Eastern Canada & Northeast U.S. |
| |
|
|  |
  | IPNI |
| |
   | North and West Zone India |
|  |
  | Northcentral U.S. |
| |
   | Northeast India & Bangladesh |
|  |
  | Northern Great Plains |
| |
 | SK-42 | Nutrition of Hybrid Willows for Bio-fuel Production |  |
  | Northern Latin America |
| |
|
|  |
  | Southeast China |
| |
|
|  |
  | Southern and Eastern Russia |
| |
   | Southern India & Sri Lanka |
|  |
  | Southern Latin America |
| |
|
|  |
  | Western U.S. |
| |
|
|  |