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渭北是国内苹果最佳产区之一,苹果种植已是该地区农业的主导产业,更是农民经济收入的主要来源。但在果园施肥方面还存在诸多问题,致使苹果产
Weibei is one of the best producing areas for domestic apples. The cultivation of apples is the leading industry in the area and the main source of income for farmers. However, fertilization in the orchard there are still many problems, resulting in apple production