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The fate of residual nitrogen (N) in specific soil layers under partial root‐zone irrigation (PRI) and fertilized with different N forms was studied using a soil column experiment with 15N‐labelled N (K15NO3) applied to 110‐cm‐deep soil layers. We found that alternate PRI (APRI) saved 34.3% more irrigation water but only decreased yield by an average of 6.2%, whereas fixed PRI (FPRI) and deficit...
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