The crop planning problem consists in defining the crop and acreage to be planted at each farm. There are several centralized mathematical programming models to support crop planning in literature. However, centralized solutions often produce economic unfairness among the members of the supply chain, being especially relevant among the farmers in the agri-food sector. To solve it, this paper tries to answer thefollowing researchquestion: is it possible to reduce inequalities among the farmers through a collaborative plan? A centralizedmulti-objectivemathematical programming model to support crop planning and the next decisions up to the sale of vegetables through a collaborativeplan is proposed to answer this question.To show the validity of the proposed collaborativeplan, results obtained are compared against those obtained without collaboration. The analysis of results shows that inequalities among the supply chain members can be highly reduced in a centralized decision-making approach by implementing the proposed collaborativeplan, reducing a bit the supply chain profit.