The agricultural sector in Portugal has been struggling, causing a rise in imported food. To understand how to improve the situation, a model was created using data from 1968. This model looked at different investments like irrigation, forest planting, livestock, and machinery. The study found that different regions needed different investments to thrive economically. For example, one area needed machinery, dairy, beef, and sheep, while another only needed sheep herds. The total investment needed by 1980 ranged from $40 million to$56 million. The study suggests that planning groups could use these models to make better long-term plans for the country's agriculture.