 |  | | |
 | grid sampling |
| |
|
|  |
  | East Zone India |
| |
   | Eastern Canada & Northeast U.S. |
|  |
  | Great Plains U.S. |
| |
|
|  |
  | North and West Zone India |
| |
|
|  |
  | Northcentral U.S. |
| |
|
|  |
  | Northeast India & Bangladesh |
| |
 | EZ INDIA-41 | Maximizing Productivity, Farmer Profit and Nutrient Use Efficiency in Rice-based Cropping Systems in Soils of Terai Agro-ecological Region of West Bengal |  |
  | Northern Latin America |
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|
|  |
  | Southeast Asia |
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|
|  |
  | Southeast U.S. |
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   | Southern India & Sri Lanka |
|  |
  | Southwest China |
| |
|
|  |
  | Western U.S. |
| |
|
|  |
 | irrigation |
| |
|
|  |
 | magnesium |
| |
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|  |
 | manure management |
| |
  | maximum economic yield (MEY) |
|  |
 | micronutrients |
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|
|  |