of;
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of;
Illinois,;
Urbana;
61801,;
Illinois,;
USA;
of;
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of;
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and;
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Iowa;
State;
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AmesSO011,;
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作物生产力; 土壤类型; 密西西比河; 大堤; 俄亥俄州; 水沉积物; 损失; 农业生产;