[Pesticide research, 1: Breeding success and winter distribution of the yellowhammer Emberiza citrinella in Danish farmland in relation to pesticide use [yellow bunting]]

agriculture biologique birds birth rate contaminantes danemark denmark dinamarca farmland herbicidas herbicide herbicides insecticidas insecticide insecticides mortalidad mortalite mortality oiseau organic farming pesticide pesticides plaguicidas polluant pollutants pollution by agriculture pollution par l'agriculture population dynamics tasa de natalidad terre agricole