4Belsky A.J.,Matzke A.,Uselman S.Survey of livestock influences on stream and riparian ecosystems in the western United States.Journal of Soil and Water Conservation,1999,54 (1):419～431.
5Maciej Dzikiewicz.Activities in nonpoint pollution control in rural areas of Poland.Ecological Engineering,2000,14:429～434.
6Jessica G.Davis,Monica Young,Bret Abnstedt.Soil characteristics of cropland fertilized with feedlot manure in the South Platte river basin of Colorado.Journal of Soil and Water Conservation,1997,52(5):327～ 331.
7Alice N.Pell.Integrated crop-livestock management systems in sub-saharan africa.Environment,Development and Sustainability,1999,1:337.
8Kogelmann W.J.,Lin H.S.,Bryant R.B.,et al.A statewide assessment of the impacts of phosphorus-index implementation in Pennsylvania.Journal of Soil and Water Conservation,2004,59(1):9～18.
9Michael B.,Jenkins A.,Dwight D.,et al.Cryptosporidium parvum oocyst inactivation in three soil types at various temperatures and water potentials.Soil Biology and Biochemistry,2002,34(8):1101 ～ 1109.
10Berka C.,Schreier H.,Hall K.Linding water quality with agricultural intensification in a rural watershed.Water,Air,and Soil Pollution,2001,127:389 ～ 401.
