Concept:
Von Thünen’s model of agricultural land use predicts a series of concentric rings around a central market city. The placement of a specific activity in a ring depends on its perishability and transportation costs relative to its weight.
Step 1: Mapping the Concentric Rings.
The classical model identifies the following sequence:
• Ring 1 (Inner): Market Gardening and Dairying. These products are highly perishable and must reach the market quickly. (A)
• Ring 2: Forestry/Wood Production. Wood was the primary fuel and building material; it is very heavy and expensive to transport, so it must be close to the city. (D)
• Ring 3, 4, 5: Various types of Crop Farming (e.g., Six-field, then Three-field system). These are less perishable than milk and less heavy than timber. (B)
• Ring 6 (Periphery): Extensive Livestock/Cattle Raising. Cattle can be "walked" to the market, resulting in low transport costs despite the distance. (C)
Step 2: Arranging the Order.
Centre $\rightarrow$ Periphery: A (Gardens) $\rightarrow$ D (Wood) $\rightarrow$ B (Three-field) $\rightarrow$ C (Cattle).
Step 3: Conclusion.
The sequence is A, D, B, C.