Cambridge IGCSE Pakistan Studies: Agricultural Development — Revision Notes

These notes summarise Section 4 Agricultural development of Cambridge IGCSE Pakistan Studies 0448 Paper 2. Learn the farming-system model, the location and needs of cotton, rice, sugar cane and wheat, the five irrigation methods, the causes and cures of waterlogging and salinity, and the main government measures. Each fact below is something Paper 2 can ask you to name, explain or evaluate.

Syllabus coverage

0448 Paper 2, Section 4 (2026 syllabus)

• 4(a) Subsistence, cash crop and livestock farming as input–process–output systems
• 4(b) Locations and uses of cotton, rice, sugar cane, wheat; livestock products; the twelve minor crops and fruits
• 4(c) Natural and human factors; subsistence examples (traditional rice, barani wheat, karez oasis); kharif and rabi cash crops; livestock and transhumance; irrigation types; waterlogging and salinity; government action; sustainability

Key terms

Term	Meaning
Subsistence farming	Growing food mainly for the farmer’s own family
Cash crop	A crop grown for sale, such as cotton or sugar cane
Kharif	Summer-sown crop harvested in autumn
Rabi	Winter-sown crop harvested in spring
Barani	Rain-fed farming without irrigation
Fragmented holding	A farm split into scattered small plots
Karez	Underground channel carrying groundwater by gravity
Perennial canal	Canal fed from a barrage, with water all year
Inundation canal	Canal that flows only when the river floods
Tubewell	Pump drawing water from a deep well
Link canal	Canal transferring water from one river to another
Bund	Low earth bank holding water on a field
Waterlogging	Soil saturated because the water table has risen near the surface
Salinity	Salt left on or in the soil after water evaporates
Transhumance	Seasonal movement of herds between summer and winter pastures

The four main crops

Crop	Season	Main areas	Needs	Uses
Cotton	Kharif	Southern Punjab, central Sindh	Long, hot, sunny summer; frost-free; dry at picking; irrigation	Lint for textiles; seed for oil and cattle cake
Rice	Kharif	Gujranwala–Sialkot rice belt; northern Sindh	High temperature; standing water; clay soil	Food; export (basmati)
Sugar cane	Kharif	Central Punjab, central Sindh, Peshawar valley	Heat; long season; heavy water	Sugar, gur; molasses; bagasse fuel
Wheat	Rabi	Irrigated Punjab and Sindh; barani Potwar	Cool growing season, warm dry ripening	Staple flour; straw for fodder

Livestock

• Buffalo and cattle: milk, meat, hides for leather, dung for fuel and manure, draught power.
• Goats and sheep: meat, milk, wool and hair, skins; herded in Balochistan and the north.
• Poultry: eggs and meat; commercial farms near large cities.

Irrigation at a glance

• Canal: inundation (flood season only) and perennial (all year, from barrages); karez (underground, Balochistan).
• Lift: Persian wheel (animal-powered) and tubewell (pumped).
• Structures: dam (store) → barrage (divert) → link canal (transfer) → distribution canal → field channel → bund.

Waterlogging and salinity

Causes: seepage from unlined canals; over-irrigation; poor drainage; flat land; then high evaporation draws salt to the surface. Effects: lower yields, abandoned land, lost income. Restoration: tubewells to lower the water table; surface and tile drains; flushing salts; salt-tolerant crops. Prevention: lining canals and watercourses; measured irrigation; drainage built into schemes.

Government action

• Land reforms: ceilings on holding size and redistribution to tenants.
• Agricultural extension and training.
• Loans and subsidies for tractors, tubewells, fertiliser and pesticides.
• High-yielding seed varieties and research.
• Evaluate: benefits often reach larger farmers first; chemical inputs raise costs and pollute; fragmentation continues through inheritance.

Worked example

Question: Explain why yields of rice on small, fragmented holdings are often low. [4]

Model answer: The plots are small and scattered, so time is wasted moving between them and machinery cannot be used efficiently [1]. Farmers lack capital, so they cannot afford enough fertiliser, pesticide or improved seed [1]. Traditional methods such as ox ploughing and hand transplanting are slow [1]. Water supply may be unreliable at the tail end of canals, and pests and diseases reduce the harvest [1].

Common mistakes and exam traps

• Swapping kharif and rabi. Wheat is the rabi crop; cotton, rice and sugar cane are kharif.
• Saying “Punjab” for every crop. Give a more precise area, such as the rice belt or southern Punjab for cotton.
• Explaining salinity without waterlogging. Salinity follows from a high water table plus evaporation; show the sequence.
• Listing irrigation methods without assessing them. The syllabus asks for advantages and disadvantages for both small farms and cash crops.
• One-sided government answers. Evaluate who benefited and what problems remain.

How is this section examined?

This content is examined on Cambridge Paper 2, The environment of Pakistan (1 hour 30 minutes, 75 marks, 50% of the qualification). You answer three questions from a choice of five; each is worth 25 marks and has four parts, (a) to (d), built around resources such as maps, graphs, tables and photographs. Part (d) specifically tests analysis and evaluation, so finish every revision topic by practising a judgement: for example, how sustainable a resource or a policy is, with evidence for and against.

Land reforms to name

Reform	Leader	Ceiling on ownership
1959	Ayub Khan	500 acres irrigated or 1,000 acres unirrigated
1972	Zulfikar Ali Bhutto	150 acres irrigated or 300 acres unirrigated
1977	Zulfikar Ali Bhutto	100 acres irrigated or 200 acres unirrigated

Land above the ceiling was to be redistributed, but loopholes (transfers to relatives) limited the effect.

Frequently asked questions

Which crops are recognised from photographs? Fields of cotton, rice, sugar cane and wheat, and buffalo, cattle, goats, sheep and poultry.

Why is barani farming risky? It depends entirely on rain, so a dry year can ruin the wheat crop and farmers cannot plan investment.

Is the tubewell good or bad? Both. It supplies water when needed and lowers a high water table, but running costs are high and over-pumping can deplete groundwater.

Related pages

• Agricultural Development study guide
• Agricultural Development practice questions
• Power revision notes

Source: Cambridge International, Cambridge IGCSE Pakistan Studies 0448 syllabus for examination in 2026, Paper 2 Section 4.