This document provides an overview of the field of agricultural economics. It discusses four major areas: 1) production economics, which examines decision-making at the farm level; 2) consumer theory, which analyzes how individuals allocate scarce income across consumption; 3) agricultural marketing, which focuses on activities that transform raw farm products into consumer goods; and 4) resource economics, which studies resource use and conservation within agriculture. Production economics is concerned with optimal resource allocation at farms. Traditional analysis uses tools like budgets and linear programming, while more recent work examines efficiency, competitiveness, and environmental interactions.