[Strawberries in film tunnels]

calidad clima climat climate cosecha costos costs crop yield cultivation cultivo cultivo protegido culture sous abri eu folie folientunnel fongicide fragaria fraise fresa fungicidas fungicides harvesting harvesting date herbicidas herbicide herbicides inversiones investissement investment obstbau optical properties policloruro de vinilo polietileno pollination pollinisation polychlorure de vinyle polyethylene polyvinyl chloride pratique culturale protected cultivation quality rendement des cultures rendimiento de cultivos strawberries technik ventilation