[Felling profits of christmas trees in cutting class II]

abattage d'arbres almacenamiento altura christmas trees classe d'arbres classification corta costos costs crop yield economic analysis economic value estudio del trabajo felling hauteur height horas laborables noruega norway plant production profitability quality labels rendement des cultures rendimiento de cultivos rentabilidad sello de calidad stockage storage temps de travail transport transporte tree classes work study working hours yield forecasting