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Soil loosening on permanent raised-beds in arid northwest China[J] He Jin;Li Hongwen;N.J. Kuhn;Zhang Xuemin;Li Wenying Soil & Tillage Research 2007,
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Conventionally Tilled and Permanent Raised Beds with Different Crop Residue Management: Effects on Soil C and N Dynamics[J] B. Govaerts;K. D. Sayre;J. M. Ceballos-Ramirez;M. L. Luna-Guido;A. Limon-Ortega;J. Deckers;L. Dendooven Plant and Soil 2006,
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浅松机设计及其参数优化 孔德军; 中国农业大学 2004,

