Indian Geography: Agriculture, Resources & Industry

1. Indian Agriculture

Agriculture is the mainstay of the Indian economy, engaging more than 50% of the workforce. It is primarily characterized by subsistence farming, heavy dependence on monsoons, and small landholdings.

Cropping Seasons in India

• Kharif (Monsoon/Autumn Crops): Sown in June-July (onset of monsoon) and harvested in September-October. Require warm, wet weather. Major Crops: Rice, Maize, Jowar, Bajra, Cotton, Jute, Groundnut, Sugarcane.
• Rabi (Winter/Spring Crops): Sown in October-December and harvested in April-June. Require cool climate during growth and warm climate during germination and ripening. Major Crops: Wheat, Barley, Gram, Mustard, Peas.
• Zaid (Summer Crops): A short season between Rabi and Kharif (March-June). Grown on irrigated lands. Major Crops: Watermelon, Muskmelon, Cucumber, Vegetables, Fodder crops.

Major Crops and Conditions

• Rice: Most important food crop. Origin: India/Indo-China. Requires high temperature (>25°C) and high humidity with annual rainfall >100 cm. Soil: Deep clayey and loamy. Leading producers: West Bengal, UP, Punjab.
• Wheat: Second most important cereal. Requires cool growing season and bright sunshine at ripening. Rainfall: 50-75 cm evenly distributed. Soil: Well-drained fertile loamy. Leading producers: UP, MP, Punjab, Haryana.
• Sugarcane: Tropical and subtropical crop. Takes almost a year to grow. Requires hot and humid climate (21°C-27°C, 75-100cm rain). Leading producers: UP, Maharashtra, Karnataka.
• Cotton: A kharif crop. Requires 210 frost-free days and bright sunshine. Soil: Black cotton soil of the Deccan plateau. Leading producers: Gujarat, Maharashtra, Telangana.
• Tea: Plantation crop. Requires warm and moist frost-free climate year-round (20°C-30°C, >150cm rain). Grows best on well-drained hill slopes (to prevent water logging near roots). Leading producers: Assam, West Bengal (Darjeeling), Tamil Nadu (Nilgiris).

Agricultural Revolutions

• Green Revolution: Increased cereal (wheat, rice) production using High Yielding Variety (HYV) seeds, fertilizers, and irrigation (M.S. Swaminathan).
• White Revolution (Operation Flood): Milk production (Verghese Kurien).
• Blue Revolution: Fish/Aquaculture.
• Yellow Revolution: Oilseeds.
• Silver Revolution: Eggs/Poultry.

2. Mineral Resources of India

Minerals are unevenly distributed in India. The Peninsular plateau contains most of the reserves of coal, metallic minerals, mica, and many other non-metallic minerals. The sedimentary rocks on the western and eastern flanks of the peninsula (Gujarat, Assam) have most of the petroleum deposits.

Metallic Minerals

• Iron Ore: Backbone of modern industrial development. India has rich deposits of Hematite and Magnetite. Major belts: Odisha-Jharkhand (Badampahar, Singhbhum), Durg-Bastar-Chandrapur (Bailadila - Chhattisgarh), Bellary-Chitradurga-Chikmagalur-Tumkur (Kudremukh - Karnataka).
• Manganese: Mainly used in manufacturing steel and ferro-manganese alloys. Odhisha is the largest producer.
• Bauxite (Aluminum Ore): Formed by decomposition of rocks rich in aluminum silicates (Laterite soils). Amarkantak plateau, Maikal hills, and the plateau region of Bilaspur-Katni. Odisha is the largest producer (Panchpatmali deposits).
• Copper: India is critically deficient in copper. Used in electrical cables, electronics. Major mines: Khetri (Rajasthan), Balaghat (MP), Singhbhum (Jharkhand).
• Gold: Kolar Gold Fields (KGF) and Hutti mines in Karnataka.

Non-Metallic Minerals

• Mica: Excellent dielectric strength and low power loss factor making it indispensable for electrical/electronic industries. India is the largest producer. Major areas: Koderma-Gaya-Hazaribagh belt of Jharkhand (leading producer), Nellore (Andhra Pradesh), Ajmer (Rajasthan).
• Limestone: Basic raw material for the cement industry and essential for smelting iron ore in a blast furnace. MP, Rajasthan, AP, Gujarat are major producers.

Energy Resources

• Coal: Most abundantly available fossil fuel in India. Two main geological ages:
  • Gondwana Coal: Over 200 million years old. Comprises 98% of India's coal reserves. Mostly bituminous. Damodar Valley (Jharia, Raniganj, Bokaro), Godavari, Mahanadi, Son, Wardha valleys.
  • Tertiary Coal: 55 million years old. Found in northeastern states: Meghalaya, Assam, Arunachal Pradesh, Nagaland. Mostly Lignite (brown coal - famous deposits at Neyveli, Tamil Nadu).
• Petroleum: Found in fault traps in sedimentary rock formations. Major oil fields: Digboi (Assam - oldest), Mumbai High (Offshore - produces over 60%), Ankleshwar (Gujarat).
• Natural Gas: Found associated or unassociated with petroleum. Krishna-Godavari basin has huge reserves.

3. Major Industries in India

• Cotton Textile Industry: Oldest and largest industry. Concentrated in the cotton belt of Maharashtra and Gujarat (Mumbai, Ahmedabad) due to raw material, moist climate, ports, and labor.
• Iron and Steel Industry: A basic or key industry. Heavily dependent on raw materials (iron ore, coking coal, limestone), hence located near the mines (Chotanagpur plateau region). Major plants: TISCO (Jamshedpur), Bhilai (Chhattisgarh), Bokaro (Jharkhand), Rourkela (Odisha), Durgapur (West Bengal).
• Information Technology (IT): Bangalore is known as the Silicon Valley of India. Other hubs: Hyderabad, Pune, Gurugram, Noida, Chennai.