Exploring options for sustainable beef cattle ranching in the humid tropics: a case study for the Atlantic Zone of Costa Rica

abonos agotamiento del suelo agriculture extensive beef beef cattle bovin bovin de boucherie carne de res cattle economic viability engrais extensive farming farming systems fertilizers gain de poids ganado bovino ganado de carne ganancia de peso intensification liveweight gain meat production mejora de pastizales mixed pastures optimization methods pastizal mixto pastizales pasture improvement pastures prairie mixte production de viande profitability ranching rentabilidad returns soil exhaustion sostenibilidad suplementos supplements sustainability tropical zones viande bovine weight gain zona tropical zone tropicale