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Alternate Freezing and Thawing Influence the Soil Porosity of High-yield Cropland Which Study Mechanism in Songliao Plain
于博 赵兰坡 闫海彬 张志丹 姜亦梅 马晓婷 任应洪 闫北辰
Chinese Agricultural Science Bulletin . 2012, (24): 80 -85 .  DOI: 10.11924/j.issn.1000-6850.2012-0959