Arranging Agricultural Regions by Latitude: Equator to Pole

The question asks us to arrange different agricultural regions based on their geographical location from the equator towards the pole. This involves understanding the approximate latitudes where these types of farming and animal rearing are typically found.

Let's analyze each region:

• (A) Commercial grain farming in the Prairies: The Prairies region in North America is located in the mid-latitudes, generally between 40°N and 60°N latitude. This area experiences temperate climates suitable for large-scale grain production.
• (B) Reindeer rearing by the Eskimos: Reindeer rearing is associated with Arctic and sub-Arctic regions, inhabited by indigenous groups like the Inuit (often referred to as Eskimos in historical contexts). These regions are found in high latitudes, close to the North Pole, typically above 60°N latitude.
• (C) Tea plantations of north-east India: North-east India is located in a subtropical to tropical zone, generally between 20°N and 28°N latitude. Tea cultivation thrives in warm, humid climates found in these latitudes.
• (D) Primitive subsistence farming in Indonesia: Indonesia is an archipelago nation situated almost entirely within the equatorial zone, spanning from approximately 6°N to 11°S latitude. Primitive subsistence farming is common in many parts of the tropical rainforest regions near the equator.

Now, let's arrange these regions from the equator (0° latitude) towards the poles based on their typical latitudes:

1. Region closest to the equator: Indonesia (D), which lies across the equator.
2. Region further north than Indonesia but still in tropical/subtropical latitudes: North-east India (C).
3. Region in mid-latitudes: The Prairies (A).
4. Region in high latitudes, closest to the pole: Arctic regions for Reindeer rearing (B).

Therefore, the correct order from the equator to the pole is (D), (C), (A), (B).

Let's summarize the approximate locations:

Arranging these from the equator ($0^\circ$) towards the pole (higher latitudes) gives the sequence: (D), (C), (A), (B).

Revision Table: Agricultural Regions by Latitude

Additional Information: Agricultural Belts and Climate

Agricultural practices and crop types often correlate strongly with climate zones, which are largely determined by latitude. Understanding these belts helps explain the distribution of farming types:

• Equatorial & Tropical Zones (approx. $0^\circ$ to $20^\circ$ N/S): High temperatures and often high rainfall. Suitable for tropical crops like rice, rubber, cocoa, coffee, and subsistence farming. Examples: Amazon Basin, Central Africa, Indonesia.
• Subtropical Zones (approx. $20^\circ$ to $35^\circ$ N/S): Transition zones with hot summers and mild winters. Suitable for crops like citrus fruits, tea, cotton, and sometimes grains. Examples: Mediterranean regions, parts of India, southern US.
• Mid-latitude / Temperate Zones (approx. $35^\circ$ to $60^\circ$ N/S): Distinct seasons with warm/hot summers and cool/cold winters. Ideal for large-scale grain farming (wheat, corn), dairy farming, and mixed farming. Examples: Prairies of North America, European plains, Pampas of Argentina.
• High-latitude / Polar Zones (above $60^\circ$ N/S): Very cold climates with long winters and short, cool summers. Limited agriculture, often involving nomadic herding (like reindeer) or specialized cold-hardy crops in specific areas. Examples: Arctic regions, parts of Siberia.

This arrangement exercise demonstrates how geographical location, specifically latitude, plays a key role in determining the type of agricultural activity prevalent in a region.