Birgitte H,Hugo FA,Erik SK.Approaches to assess the environmental impact of organic farming with particular regard to Denmark.Agriculture Ecosystems and Environment,2001,83:11-26.
[3]
Pacini C,Wossink A,Giesen G et al.Evaluation of sustainability of organic,integrated and conventional farming systems:a farm and field-scale analysis.Agriculture Ecosystems and Environment,2003,95:273-288.
[4]
Younie D,Watson CA.Soil nitrate-N levels in organically and intensively managed grassland systems.Aspects Appl Biol,1992,30:235-238.
[5]
谢标,王晓蓉,丁竹红.有机农业的环境效益评估.水土保持学报,2002,22(2):71-74.
[6]
Randall LD,Hailin Z,Jackie LS et al.Soil characteristics and phosphorus level effect on phosphorus loss in runoff.Journal of Environmental Quality,2005,8:1640-1650.
Tunney H,Carton OT,Brookes PC et al.Phosphorus loss from soil to water.New York:CAB International Press,1997:253-271.
[11]
Pote DH,Daniel TC,Nichols DJ et al.Relationship between phosphorus levels in three ultisols and phosphorus concentrations in runoff.Journal of Environmental Quality,1999,28:170-175.
