6SIX J,PAUSTIAN K, ELLAOTT E T, et al. Soil structure and s.il organic matter:Distribution of aggregate size classes and aggregale associated carbon [J]. Soil Science Society of America Journal, 2000,64:681 - 689.
7J PAPEND1CK R I,PARR J F. No - till farming:The way of the future for a sustainable agricullure [J]. Annals of Arid Zone, 1997,36:193 - 208.
8DALAI R C,CHART K Y. Soil organic matter in rained cropping systems of the Australian cereal bell [J]. Australian Jaurnal of Soil Research,2001,39:435 - 464.
9LE BISSONNAIS Y. Aggregate stability and assessmen, of soil crustability and erodibility: 1. Theory and melhodology [J]. European Journal of Soil Scienee, 1996,47 : 425 - 437.
10JIAO Y, WHALEN J K, HENDERSHOT W H. No-tillage and manure applications increase aggregation and improve nutrien! retention in a sandy-loam soil[J]. Geoderma, 2006,134 (1 - 2) : 24 - 33.
