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To achieve high‐yielding and eco‐friendly crop production, it is crucial to identify the critical water requirement period of crops, especially in annual crop production systems. A 2‐year experiment was established to study the annual yield, total water consumption and water productivity (WP) of a winter wheat (Triticum aestivum L.) and summer maize (Zea mays L.) system in the Huang‐Huai‐Hai Plain...
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