Technical and economic evaluation of a new technology of sugar beet harvest with topping and incorporation of tops into soil

abonos verdes almacenamiento aradura beta vulgaris cosecha cost analysis costo total engrais vert fertilidad del suelo ganancias green manures harvesting labour nutritive value operating costs perte au stockage ploughing precios prices prix profit remolacha azucarera rendement rendimiento soil fertility stockage storage storage losses sugar beet total costs valeur nutritive valor nutritivo yields