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- food security (2)
- agricultural productivity (1)
- agriculture and state (1)
- alternative treatment (1)
- apples (1)
- chemical engineering (1)
- chemical processes (1)
- climatic factors (1)
- complications (1)
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- congresses (1)
- crops and climate (1)
- diseases (1)
- dogs (1)
- economic development (1)
- environmental aspects (1)
- equipment and supplies (1)
- experiments (1)
- fathers and sons (1)
- fibers (1)
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