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These findings reveal previously hidden aspects of magnetism in Sm-Co magnets and, by identifying weak points in the microstructure, provide guidelines for improving these high-performance magnetic materials.To provide an appropriate tillage fertilization model for improving N utilization efficiency and increasing production, the field experiments were conducted to study the effects on root distributions and N utilization efficiency of summer maize involving different straw mulching modes combined with N fertilization. No (N, low (N1)