[Lettuces (Lactuca sativa L.)]

cargas variables charge fixe charge variable climatic requirements costos fijos cultivation cultivo enfermedades de las plantas exigence climatique exigence des plantes fertilisation fertilizer application fixed costs income irrigation lactuca sativa laitue lettuces maladie des plantes necesidades de las plantas pests of plants plagas de plantas plant diseases plant requirements plant viruses plantation planting pratique culturale preservation ravageur des plantes refrigeration renta revenu riego variable costs variedades varieties virus de las plantas