Recent spatial and temporal erosion of Iowa Mollisols

摘要：

Degradation of Iowa mollisols can occur through soil fertility loss, soil structure degradation, soil organic matter depletion, and/or soil erosion. Of these, soil erosion is likely the most serious because eroded soil is normally replaced only through soil regeneration, a renewal process resulting in less than about 0. 5 ton/ha of new soil annually ( Montgomery, 2007 ). Humans affect soil erosion by making decisions a bout crop management and conservation practices. Recent science strongly suggests humans are also impacting erosion by affecting climate; in Iowa frequency of heavy rainstorms is increasing. The goal of this paper is to compare Iowa soil erosion rates to soil renewal rates and U. S. Natural Resources Conservation Service (NRCS) i dentified tolerable soil erosion rates of 11 ton/(ha ? yr).

关键词： mollisols soil erosion remote sensing wepp

作者: Richard M.Cruse Brian K.Gelder Enheng Wang

作者单位: Department of Agronomy, Iowa State University, Ames, IA USA College of Foresry, Northeast Forestry University, Harbin, 150040, China

会议类型: 国际会议

会议名称: International Symposium on Soil Quality and Management of World Mollisols(世界黑土质量与管理国际研讨会 ISSQMWM2010)

会议地点: 哈尔滨

会议语种:英文

页码: 70-71

在线出版日期: 2010-07-13（万方平台首次上网日期，不代表论文的发表时间）