Cotton is one of the most important fiber and cash crops of the
world and plays a vital role in the agricultural economy of many developing
countries, especially Pakistan. It is often called “white gold” because
of its high economic value and its close linkage with the textile industry,
employment generation, and export earnings. In Pakistan, cotton not only
provides raw material to textile mills but also supports oil extraction,
livestock feed through cottonseed cake, and livelihoods of millions of farmers.
Despite its importance, cotton productivity in many areas remains below
potential due to improper crop management, pest pressure, water stress, and
climatic challenges. Adoption of modern production technology of cotton crop
is essential to achieve higher yield, better fiber quality and sustainable
income for farmers.
Climate Requirements for Cotton Production
Cotton is a warm-season crop that requires a long frost-free
growing period. It grows best in tropical and subtropical climates. The optimum
temperature for cotton germination ranges from 20 to 30 °C, while ideal
temperature for vegetative growth and boll development is between 25 and 35 °C.
Temperatures below 15 °C delay germination and early growth, whereas extremely
high temperatures above 40 °C can cause flower and boll shedding. Cotton
requires moderate rainfall, generally between 600 and 800 mm, well distributed
throughout the growing season. Excessive rainfall or prolonged cloudy weather
favors pest and disease incidence and leads to poor boll opening. Bright
sunshine during flowering and boll formation is essential for high yield and
good fiber quality.
Soil Requirements and Field Selection
Cotton can be grown on a wide range of soils, but it performs best
on deep, fertile, and well-drained loam or clay loam soils. Soils with
good water-holding capacity and proper aeration are ideal for strong root
development. The suitable soil pH for cotton lies between 6.0 and 8.0. Highly
saline, sodic, or waterlogged soils should be avoided as they restrict root
growth and nutrient uptake. Proper land leveling is important to ensure uniform
irrigation and avoid water stagnation. Fields with a history of severe weed
infestation or persistent soil-borne diseases should be managed carefully
before cotton cultivation.
Land Preparation
Land preparation plays a key role in establishing a healthy cotton
crop. The main objective of land preparation is to create a fine seedbed that
ensures good germination and strong root penetration. The field should be
ploughed deeply 2–3 times using a moldboard or disc plough, followed by
harrowing and planking. Deep ploughing helps in breaking hardpan layers,
improving soil aeration, and destroying overwintering insect pests. After
ploughing, the field should be leveled properly to facilitate uniform water
distribution. Incorporation of well-decomposed farmyard manure (FYM) at
the rate of 8–10 tons per acre during final land preparation improves soil
fertility, organic matter content, and microbial activity.
Selection of Varieties and Seed Quality
Selection of suitable cotton varieties is one of the most important
components of production technology. Farmers should always use certified
seed recommended by agricultural research institutions and extension
departments for their specific region. In Pakistan, Bt cotton varieties are
widely grown because of their resistance to bollworms and higher yield
potential. While selecting a variety, factors such as yield potential,
resistance to pests and diseases, fiber length and strength, and adaptability
to local climate should be considered. Seed should be clean, healthy, bold, and
free from inert matter and weed seeds.
Seed Rate and Seed Treatment
The recommended seed rate depends on the variety and method of
sowing. For Bt cotton, a seed rate of 6–8 kg per acre is generally
sufficient, whereas non-Bt varieties may require 10–12 kg per acre. Seed
treatment is an essential practice to protect young seedlings from seed-borne
and soil-borne diseases. Seeds should be treated with appropriate fungicides
such as carbendazim or thiram before sowing. Seed treatment not only improves
germination but also ensures healthy early growth. In some cases, seed
inoculation with beneficial microorganisms helps in better nutrient uptake and
early vigor.
Sowing Time and Method
Timely sowing of cotton is crucial for obtaining high yield. In
Pakistan, the recommended sowing time varies by region. In Sindh, cotton is
usually sown from March to April, while in Punjab, sowing is done from April to
May. Delayed sowing exposes the crop to severe pest attack and unfavorable
weather conditions, resulting in yield losses. Cotton can be sown by different
methods, including drilling, dibbling, or ridge sowing. Ridge sowing is
preferred as it provides better drainage, aeration, and root development. The
recommended spacing for cotton is generally 75 cm between rows and 30 cm
between plants, which ensures optimum plant population and reduces
competition for resources.
Nutrient Management in Cotton Crop
Cotton is a heavy feeder and requires a balanced supply of
nutrients for proper growth and development. Nitrogen, phosphorus, and
potassium are the major nutrients required in large quantities. Nitrogen
promotes vegetative growth, phosphorus supports root development and early
flowering, while potassium improves boll formation and fiber quality. A general
fertilizer recommendation for cotton is 60–80 kg nitrogen, 30–40 kg
phosphorus (P₂O₅), and 30 kg potassium (K₂O) per acre, depending on soil fertility status. Phosphorus and potassium
should be applied at sowing, along with one-third of nitrogen. The remaining
nitrogen should be applied in two equal splits, one at flowering and the other
at boll formation stage. Deficiency of micronutrients such as zinc and boron is
common in many cotton-growing areas and should be corrected through soil or
foliar application.
Irrigation Management
Efficient irrigation management is essential for successful cotton
production. Cotton has a deep root system and can tolerate short dry spells,
but prolonged water stress at critical stages significantly reduces yield. The
first irrigation is usually applied 30–35 days after sowing, depending
on soil moisture and weather conditions. Subsequent irrigations should be
scheduled according to crop requirement and soil type. The most critical stages
for irrigation are squaring, flowering, and boll formation. Water stress during
flowering leads to heavy shedding of flowers and young bolls. At the same time,
excessive irrigation and waterlogging should be avoided, as they promote root
diseases and nutrient losses. Proper drainage is especially important during
the rainy season.
Weed Management
Weeds are a serious problem in cotton fields, especially during the
early growth stages. They compete with cotton plants for nutrients, water,
light, and space, resulting in reduced yield. The critical period for weed
competition in cotton is the first 40–60 days after sowing. Weed control
can be achieved through a combination of cultural, mechanical, and chemical
methods. Manual hoeing and inter cultivation are effective but labor-intensive.
Pre-emergence and post-emergence herbicides can also be used as per
recommendations.
Pest Management in Cotton Crop
Cotton is highly susceptible to insect pests, which are a major
constraint to high productivity. Common insect pests of cotton include jassid,
whitefly, thrips, aphids, pink bollworm, and American bollworm. These pests not
only reduce yield but also affect fiber quality. Integrated Pest Management
(IPM) is the most effective and environmentally friendly approach to control
cotton pests. IPM includes the use of resistant varieties, timely sowing,
balanced fertilization, conservation of natural enemies, and judicious use of
pesticides. Chemical control should be adopted only when pest population
exceeds the economic threshold level. Excessive and indiscriminate use of
pesticides should be avoided as it leads to resistance development and
environmental pollution.
Disease Management
Cotton crop is affected by several diseases that can cause significant
yield losses. Important diseases include cotton leaf curl virus (CLCuV), root
rot, bacterial blight, and wilt. Use of disease-resistant varieties is the most
effective method of disease control. Crop rotation, proper field sanitation,
and balanced fertilization also help in reducing disease incidence. In case of
fungal diseases, seed treatment and soil management play a key role. Removal
and destruction of infected plants help in preventing the spread of viral
diseases.
Use of Plant Growth Regulators
In some cases, excessive vegetative growth in cotton results in
poor boll retention and delayed maturity. Application of plant growth
regulators such as mepiquat chloride can help in controlling vegetative
growth, improving light penetration, and enhancing boll formation. However,
these chemicals should be used carefully and only on the recommendation of
agricultural experts, as improper use can negatively affect crop growth.
Harvesting of Cotton Crop
Harvesting is the final and most important operation in cotton
production technology. Cotton should be picked when the bolls are fully opened
and dry. Picking should be avoided during early morning or after rain, as
moisture reduces fiber quality and increases contamination. Cotton is usually
harvested in 2–3 pickings to ensure better quality lint. Clean picking
practices should be followed to avoid mixing of leaves, sticks, and other
foreign materials with seed cotton.
Post-Harvest Handling and Storage
Proper post-harvest handling is essential to maintain cotton
quality. After picking, cotton should be dried properly before storage. Moist
cotton encourages fungal growth and deterioration of fiber quality. Cotton
should be stored in clean, dry, and well-ventilated places. Contact with soil,
plastic, or other contaminants should be avoided. Proper storage ensures better
market price and reduces post-harvest losses.
Yield and Economic Importance
With traditional practices, average cotton yield remains low.
However, adoption of improved production technology can significantly increase
yield. Under good management practices, cotton yield can reach 30–40 maunds
per acre or even higher, depending on variety and environmental conditions.
Higher yield and better fiber quality increase farmers’ income and contribute
to national economic growth. Cotton also plays a key role in poverty reduction
by providing employment in farming, ginning, spinning, and textile industries.
Conclusion
The production technology of cotton crop is a complete package of
practices that begins with proper land preparation and ends with careful
harvesting and storage. Each step, from variety selection and timely sowing to
balanced fertilization, efficient irrigation, and integrated pest management,
plays a vital role in determining yield and quality. In the present era of
climate change and rising input costs, adoption of scientific and sustainable
cotton production practices is more important than ever. By following
recommended production technology, farmers can increase productivity, reduce
losses, improve fiber quality, and ensure sustainable cotton farming for the
future.
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