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Grade evaluation and distribution characteristics of nutrient barriers in grain field in central Hebei Plain, China
LYU Jiaqing, SHANG Dan, ZHANG Ruifang, TONG Bingxin, MA Wenqi
Chinese Journal of Applied Ecology . 2025, (9): 2649 -2657 .  DOI: 10.13287/j.1001-9332.202509.015