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Spatial-Temporal Distribution Characteristics and Limiting Factors of Medium-low Yield Farmland in Tianjin
潘洁,吕雄杰,肖辉 and 陆文龙
Chinese Agricultural Science Bulletin . 2014, (32): 178 -183 .  DOI: 10.11924/j.issn.1000-6850.2014-0767