Pesticide research, 15: Yellowhammer studies on organic and conventional farms: Comparative analyses of clutch size, nestling growth and foraging behaviour in relation to pesticide sprayings

agriculture biologique birds campo champ crops cultivation cultivo cultivos danemark denmark dinamarca ecologia ecologie ecology encuestas fields foraging habitat habitats insecticidas insecticide insecticides litter size measurement mesure nest boxes oiseau organic farming plante de culture pratique culturale recherche de nourriture surveys