 |  | | |
  | Great Plains U.S. |
| |
|
|  |
  | Middle East |
| |
|
|  |
  | Northcentral U.S. |
| |
|
|  |
  | Northwest China |
| |
|
|  |
  | Southeast U.S. |
| |
   | Southern India & Sri Lanka |
|  |
  | Southern Latin America |
| |
|
|  |
 | legumes |
| |
|
|  |
 | manure management |
| |
  | maximum economic yield (MEY) |
|  |
 | micronutrients |
| |
|
|  |
 | nitrogen |
| |
|
|  |
 | nutrient management |
| |
|
|  |
  | Africa |
| |
|
|  |
  | Eastern Canada & Northeast U.S. |
| |
|
|  |
  | North and West Zone India |
| |
|
|  |
  | Southern and Eastern Russia |
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|
|  |