论中世纪城市兴起的原因——以皮雷纳《中世纪的城市》为考察对象
Published in 三门峡职业技术学院学报 • Jan 1, 2011
Authors:
李安敏
Abstract
Dissolved organic carbon (DOC) export from soils can play a significant role in soil C cycling and in nutrient and pollutant transport. However, information about DOC losses from agricultural soils as influenced by management practices is scarce. We compared the effects of mineral fertilizer (MF) an...
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