共 13 条
[2]
WorldSupplyandMajorEuro-pean Market. OrganicFoodandBeverages. . 2002
[3]
Assesing the consequences of con-vertion to organic agriculture. O′Riordan T,Cobb D. Journal of Agriculture Eco-nomics . 2001
[4]
Organic agriculture:does it en-hance or reduce the nutritional value of plant food. Brandt K,Molgaard J P. Jour-nal of the Science of Food and Agriculture . 2001