What are G. arboreum, G. herbaceum, G. hirsutum and G. barbadense, whose all the four species are cultivated in India ? (G = Gossypium)

1. Classification of Major Crops in India (basic)

To understand Indian agriculture, we first classify crops based on two primary lenses: seasonality and utility. Because India possesses a diverse range of agro-climatic zones, our farmers have developed a sophisticated cropping calendar that follows the rhythm of the monsoons. The most fundamental classification is seasonal, dividing the agricultural year into three distinct windows: Kharif (monsoon crops), Rabi (winter crops), and Zaid (short summer crops). Indian Economy, Nitin Singhania, Agriculture, p.290. While Kharif crops like rice and maize depend heavily on the Southwest Monsoon, Rabi crops like wheat and mustard thrive on the residual moisture and cooler temperatures of winter. Zaid crops act as a bridge, grown on dry lands during the sweltering heat of March to June, often requiring irrigation to produce water-rich fruits like watermelon and cucumber. Geography of India, Majid Husain, Agriculture, p.59. Beyond the calendar, crops are classified by their end-use. This helps us distinguish between Foodgrains (which include cereals like rice and wheat, and pulses like gram) and Commercial Crops (grown for sale/profit). Among commercial crops, Fibre Crops hold a special place. For instance, India is globally unique as the only country that commercially cultivates all four species of the Gossypium (cotton) genus. These include the 'Old World' diploid species (G. arboreum and G. herbaceum) and the high-yielding 'New World' tetraploid species (G. hirsutum and G. barbadense). INDIA PEOPLE AND ECONOMY, NCERT Class XII, Chapter 3, p.32. This botanical diversity allows India to produce a wide range of cotton qualities, from short-staple to the premium long-staple varieties prized for luxury textiles.

To keep these organized, here is a quick reference for the seasonal classification:

Season	Sowing/Harvest Period	Key Characteristics	Major Crops
Kharif	June–October	Coincides with SW Monsoon; requires high heat and humidity.	Rice, Maize, Cotton, Groundnut
Rabi	October–April	Sown in winter; requires cool climate and moderate water.	Wheat, Barley, Mustard, Gram
Zaid	March–June	Short summer duration; mostly grown under irrigation.	Watermelon, Cucumber, Fodder crops

Sources: Indian Economy, Nitin Singhania, Agriculture, p.290; Geography of India, Majid Husain, Agriculture, p.59; INDIA PEOPLE AND ECONOMY, NCERT Class XII, Chapter 3: Land Resources and Agriculture, p.32

2. Agro-Climatic Requirements for Cotton (basic)

To understand cotton cultivation, we must first look at its climatic 'comfort zone.' Cotton is a tropical and sub-tropical Kharif crop that demands a warm climate and a long, sunny growing period. One of the most critical requirements for cotton is a minimum of 210 frost-free days; frost is the primary enemy of the cotton plant as it damages the sensitive bolls. While the crop thrives in temperatures between 21°C and 30°C, it requires a modest amount of rainfall, typically ranging between 50 and 75 cm Geography of India, Soils, p.11. In regions like the north-western plains (Punjab and Haryana), where rainfall is lower, cotton relies heavily on canal irrigation to achieve high yields INDIA PEOPLE AND ECONOMY, Land Resources and Agriculture, p.32.

The soil is perhaps the most famous aspect of cotton's requirements. It is best grown in Black Soil (Regur), which is so synonymous with the crop that it is often called 'Black Cotton Soil.' These soils, formed from weathered Cretaceous lava rocks in the Deccan Trap, have a high clay content and an exceptional water-retaining capacity Geography of India, Soils, p.11. This ability to hold moisture is vital because cotton is highly sensitive to moisture stress, especially during the flowering and boll development stages. In central and southern India, where cotton is often rain-fed, farmers frequently use strip cropping—planting rows of pigeon-pea or ragi alongside cotton—to manage soil health and risk Environment and Ecology, Major Crops and Cropping Patterns in India, p.40.

India holds a unique biological distinction: it is the only country that commercially cultivates all four species of cotton. These include the 'Old World' diploid species (G. arboreum and G. herbaceum) and the 'New World' tetraploid species (G. hirsutum and G. barbadense). While G. hirsutum (Upland cotton) dominates production due to its high yield, G. barbadense (Egyptian cotton) is the gold standard for fiber quality INDIA PEOPLE AND ECONOMY, Land Resources and Agriculture, p.32. Understanding these requirements helps us see why the Deccan Plateau (covering Maharashtra, Gujarat, and Telangana) remains the heartland of Indian cotton production NCERT Contemporary India II, The Rise of Nationalism in Europe, p.9.

Sources: Geography of India, Soils, p.11; INDIA PEOPLE AND ECONOMY, Land Resources and Agriculture, p.32; Environment and Ecology, Major Crops and Cropping Patterns in India, p.40; NCERT Contemporary India II, The Rise of Nationalism in Europe, p.9

3. Geographical Distribution of Cotton in India (intermediate)

To understand the geographical distribution of cotton in India, we must first appreciate India's unique biological standing: it is the only country in the world where all four cultivated species of cotton are grown commercially. These include the 'Old World' diploid species (G. arboreum and G. herbaceum) and the 'New World' tetraploid species (G. hirsutum and G. barbadense). While G. hirsutum (Upland cotton) dominates global production, the long-staple 'American' variety, locally known as 'Narma', is particularly prominent in India's north-western regions INDIA PEOPLE AND ECONOMY, Chapter 3, p.32. Cotton is primarily a Kharif crop that thrives in semi-arid conditions, requiring a clear sky during the flowering stage to prevent boll rot and ensure fiber quality.
The distribution of cotton in India is traditionally divided into three distinct agro-ecological zones, each with unique soil and water profiles:

• The North-Western Zone: Comprising Punjab, Haryana, and Northern Rajasthan. Here, cotton is grown under irrigated conditions, focusing on high-yielding varieties like Narma.
• The Western/Central Zone: This includes Gujarat and Maharashtra, the heartland of Indian cotton. This region is famous for its Black Soil (Regur), which is self-ploughing and has excellent moisture-retention capabilities, making it ideal for rain-fed cotton cultivation Geography of India, Spatial Organisation of Agriculture, p.28. Maharashtra, with Mumbai as its 'Cottonopolis,' remains a titan in both production and textile manufacturing Geography of India, Industries, p.14.
• The Southern Zone: Spanning the plateaus of Andhra Pradesh, Karnataka, and Tamil Nadu. Tamil Nadu is notable for having the largest number of cotton mills in the country, particularly concentrated in Coimbatore Geography of India, Industries, p.15.

Overall, cotton occupies roughly 4.7% of India's total cropped area, and the country ranks second globally in production, trailing only China INDIA PEOPLE AND ECONOMY, Chapter 3, p.32. The spatial organization of this crop is a perfect example of how soil types (like the basaltic trap of the Deccan) and climate (clear sunny days during ripening) dictate the economic geography of a nation.

Sources: INDIA PEOPLE AND ECONOMY, Land Resources and Agriculture, p.32; Geography of India, Spatial Organisation of Agriculture, p.28; Geography of India, Industries, p.14-15

4. Biotechnology and Cotton: The Bt Cotton Era (intermediate)

Cotton is a cornerstone of Indian agriculture, with India believed to be the original home of the plant and currently standing as the world's second-largest producer NCERT Class X Geography, The Age of Industrialisation, p.87. India is uniquely the only country to commercially grow all four major cultivated species: the diploid "Old World" species (G. arboreum and G. herbaceum) and the tetraploid "New World" species (G. hirsutum and G. barbadense) NCERT Class XII Geography, Land Resources and Agriculture, p.32. However, cotton is traditionally highly susceptible to pests, particularly the American Bollworm, which led to the most significant shift in Indian biotechnology: the introduction of Bt Cotton.

Bt Cotton is a Genetically Modified (GM) crop that incorporates genes from the soil bacterium Bacillus thuringiensis. These genes (such as Cry 1 Ac) produce a protein toxic to specific pests like bollworms, thereby reducing the need for chemical insecticides. Following successful trials, the Government of India approved its commercial cultivation in 2002 Majid Hussain, Environment and Ecology, Major Crops and Cropping Patterns in India, p.40. Today, it remains the only GM crop officially permitted for commercial production in India, covering over 90% of the country's cotton acreage Vivek Singh, Indian Economy, Agriculture - Part II, p.342-343.

Feature	Old World Cotton (Diploid)	New World Cotton (Tetraploid)
Species	G. arboreum, G. herbaceum	G. hirsutum, G. barbadense
Key Trait	Native to Asia/Africa; hardy	G. hirsutum (High yield); G. barbadense (Superior fiber)

The regulatory landscape is governed by the Genetic Engineering Appraisal Committee (GEAC), the apex body under the Ministry of Environment, Forest and Climate Change (MoEFCC), which operates under the Environment Protection Act 1986 Vivek Singh, Indian Economy, Agriculture - Part II, p.342. While Bt Cotton has significantly increased yields, it has also faced economic and ecological challenges. To ensure farmers' access, the government intervened in 2016 to regulate seed prices and slash "trait fees" (royalties) paid to technology providers like Monsanto-Mahyco Vivek Singh, Indian Economy, Agriculture - Part II, p.343. Furthermore, while bollworms are controlled, new "secondary" pests like Mealy-bugs and Mirid-bugs have emerged as potential threats to the crop Majid Hussain, Environment and Ecology, Major Crops and Cropping Patterns in India, p.40.

Sources: NCERT Class X Geography, The Age of Industrialisation, p.87; NCERT Class XII Geography, Land Resources and Agriculture, p.32; Vivek Singh, Indian Economy, Agriculture - Part II, p.342-343; Majid Hussain, Environment and Ecology, Major Crops and Cropping Patterns in India, p.40

5. Institutional Support and the 'Silver Fiber Revolution' (intermediate)

To understand the Silver Fiber Revolution, we must first look at the biological diversity of cotton in India. India holds a unique global distinction: it is the only country that commercially cultivates all four major species of the genus Gossypium. These are categorized into 'Old World' species (G. arboreum and G. herbaceum), which are indigenous and often hardier, and 'New World' species (G. hirsutum and G. barbadense), which are tetraploid and known for higher yields and superior fiber length INDIA PEOPLE AND ECONOMY, TEXTBOOK IN GEOGRAPHY FOR CLASS XII (NCERT 2025 ed.), Chapter 3, p.32. While G. hirsutum (Upland cotton) dominates global production, the premium G. barbadense (Egyptian cotton) is the gold standard for quality. In the Indian context, long-staple American varieties grown in the north-west are locally referred to as 'Narma' INDIA PEOPLE AND ECONOMY, TEXTBOOK IN GEOGRAPHY FOR CLASS XII (NCERT 2025 ed.), Chapter 3, p.32. Despite having the world's largest area under cotton cultivation—roughly 105 to 122 lakh hectares, accounting for about 35% of global acreage—India ranks second to China in total production Geography of India, Majid Husain (9th ed.), Industries, p.9-11. This gap between acreage and yield, along with a shortage of high-quality long-staple fiber, defines the need for institutional intervention. The Silver Fiber Revolution refers to the concerted effort to increase the productivity and quality of Indian cotton to meet the demands of a growing textile industry. Currently, India must import premium long-staple cotton from countries like Egypt, Sudan, and the USA to sustain high-end textile manufacturing Geography of India, Majid Husain (9th ed.), Industries, p.17. Economically, cotton is a 'pure' raw material, meaning it does not lose weight during processing. This allows textile mills to be established either near the raw material sources (like the black soil tracts of Gujarat and Maharashtra) or near consumption markets with good transport and moisture levels Geography of India, Majid Husain (9th ed.), Industries, p.9. To support the 5.8 million farmers dependent on this crop, the government focuses on three primary growing zones: the North-West (Punjab, Haryana), the West (Gujarat, Maharashtra), and the Southern Plateau (Andhra Pradesh, Karnataka, Tamil Nadu) INDIA PEOPLE AND ECONOMY, TEXTBOOK IN GEOGRAPHY FOR CLASS XII (NCERT 2025 ed.), Chapter 3, p.32.

Cotton Category	Species Examples	Key Characteristics
Old World (Diploid)	G. arboreum, G. herbaceum	Indigenous to Asia/Africa; generally shorter staple.
New World (Tetraploid)	G. hirsutum, G. barbadense	High yield; barbadense is prized for extra-long staple quality.
Indian 'Narma'	Long-staple American varieties	Grown predominantly in the North-western regions (e.g., Punjab).

Sources: INDIA PEOPLE AND ECONOMY, TEXTBOOK IN GEOGRAPHY FOR CLASS XII (NCERT 2025 ed.), Chapter 3: Land Resources and Agriculture, p.32; Geography of India, Majid Husain (9th ed.), Industries, p.9, 11, 17

6. The Four Cultivated Species of Gossypium (exam-level)

Welcome! To understand cotton cultivation in India, we must first look at the biological diversity of the Gossypium genus. While there are dozens of wild species, only four have been domesticated for fiber production globally. India holds a prestigious and unique position in the world of agriculture: it is the only country where all four of these cultivated species are grown on a commercial scale. These species are categorized primarily by their genetic makeup and their geographic origins, divided into "Old World" and "New World" cottons.

The Old World species, often referred to as "Desi" cotton in India, include G. arboreum and G. herbaceum. These are diploid (having two sets of chromosomes) and are known for being hardy and resistant to local pests, though they typically produce short-staple, coarser fibers. In contrast, the New World species, G. hirsutum and G. barbadense, are tetraploid (four sets of chromosomes). These were introduced to India and are prized for their superior quality. G. hirsutum (Upland cotton) is the workhorse of the global industry, accounting for the vast majority of production due to its high yield INDIA PEOPLE AND ECONOMY, Chapter 3, p. 32. Meanwhile, G. barbadense (Egyptian or Sea Island cotton) represents the pinnacle of quality, producing the longest and strongest fibers used in luxury textiles.

Species Name	Common Name	Category	Fiber Characteristics
G. arboreum	Tree Cotton	Old World (Diploid)	Short staple, coarse; very hardy.
G. herbaceum	Levant Cotton	Old World (Diploid)	Short staple; drought resistant.
G. hirsutum	Upland Cotton	New World (Tetraploid)	Medium to long staple; highest global yield.
G. barbadense	Sea Island Cotton	New World (Tetraploid)	Extra-long staple; premium quality.

In the Indian context, the north-western parts of the country predominantly grow G. hirsutum, locally referred to as 'narma' INDIA PEOPLE AND ECONOMY, Chapter 3, p. 32. Despite the shift toward high-yielding varieties and hybrids since the 1970s, India still exports quantities of the coarse, short-staple desi cotton that stems from the Old World species Environment and Ecology, Majid Hussain, Major Crops and Cropping Patterns in India, p. 40. This genetic variety allows India to cater to everything from heavy industrial canvas to the finest luxury apparel.

Sources: INDIA PEOPLE AND ECONOMY, Chapter 3: Land Resources and Agriculture, p.32; Environment and Ecology, Majid Hussain, Major Crops and Cropping Patterns in India, p.40

7. Solving the Original PYQ (exam-level)

You have just explored the diversity of commercial crops and the significance of India’s varied agro-climatic zones. This question tests your ability to link botanical nomenclature—specifically the genus Gossypium—to its economic utility. The building blocks of plant classification meet geographic uniqueness here, as India is the only nation in the world to commercially cultivate all four major species of this specific fiber crop. As noted in NCERT Class XII: India People and Economy, understanding the distinction between "Old World" diploid species and "New World" tetraploid species is crucial for mastering the agricultural geography of India.

To arrive at the correct answer, reason through the names provided. If you recall that G. hirsutum accounts for the majority of global production and G. barbadense is prized for its superior fiber quality (like Egyptian cotton), the connection to Species of cotton becomes immediate. India’s unique position in growing the tree cotton (arboreum) and Levant cotton (herbaceum) alongside these modern varieties is a hallmark of its textile sector. Therefore, by identifying the genus Gossypium, you can confidently select (B) as the correct choice.

UPSC often includes "related-but-wrong" options like silk, jute, or wool to test the precision of your knowledge. The trap here lies in the fact that all four options are fibers. However, silk is an animal protein (from the silkworm Bombyx mori), wool is an animal hair, and jute belongs to the genus Corchorus. Only cotton belongs to the Malvaceae family and the genus Gossypium, making the other options biologically incorrect despite their similar economic roles.