 |  | | |
 | nitrogen |
| |
|
|  |
  | Brazil |
| |
|
|  |
  | Eastern Canada & Northeast U.S. |
| |
|
|  |
  | Great Plains U.S. |
| |
|
|  |
  | Mexico & Central America |
| |
   | North and West Zone India |
|  |
  | Northcentral China |
| |
|
|  |
  | Northeast India & Bangladesh |
| |
|
|  |
  | Northern Latin America |
| |
|
|  |
  | South Zone India |
| |
|
|  |
  | Southeast China |
| |
|
|  |
  | Southern and Eastern Russia |
| |
   | Southern India & Sri Lanka |
|  |
  | Southern Latin America |
| |
|
|  |
  | Western Canada |
| |
|
|  |
 | nutrient deficiency |
| |
|
|  |
 | nutrient removal |
| |
|
|  |