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 | fertilizer economics |
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  | Eastern Canada & Northeast U.S. |
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  | Great Plains U.S. |
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   | North and West Zone India |
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  | Northcentral China |
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  | Northern Great Plains |
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  | Northwest China |
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| AR-31F | Development and Implementation of Fertilizer BMP Guides for Six Selected Major Cropping Systems |  |
 | LA-20F | Economics of Cotton Quality Response |  |
  | Southern India & Sri Lanka |
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  | Western U.S. |
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 | field variability |
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 | foliar fertilization |
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 | fruits |
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 | high yields |
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 | irrigation |
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 | magnesium |
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