High-yielding variety seeds

Also called: HYV seeds · Topic: Land Reforms, the Green Revolution and Farm Subsidies · NCERT: Class 11, Ch 2 "Indian Economy 1950-1990"; Class 11, Ch 5 "Rural Development"

Meaning

High-yielding variety (HYV) seeds are seeds bred to give a much higher yield per hectare (output from each hectare of land) than traditional seeds. They reach that yield only when they get the right doses of chemical fertiliser, pesticide and assured irrigation (water every time the crop needs it, not only when it rains).

HYV seeds were at the centre of India's Green Revolution, the large rise in wheat and rice output. They helped India become self-sufficient in food by 1971 [3].

Crop yield = output ÷ area (kg or tonnes per hectare). This is the number HYVs are designed to raise.

Explanation

How HYV seeds work

• Semi-dwarf plants. Most HYV wheat and rice plants have short, stiff stems.
• When fertiliser is added, the ear of grain grows heavy.
• A tall traditional plant then falls over. This is called lodging, and it ruins the crop.

• A short stem holds the heavy grain upright. So the plant turns more fertiliser into grain, not into straw.

• Short duration. HYVs mature faster than traditional seeds.

• The field is free sooner.

• With irrigation, farmers can grow a second crop in the same year. This is multiple cropping.

• Worked example (crop yield): a farmer gets 40 tonnes of wheat from 10 ha.

• Yield = 40 ÷ 10 = 4 t/ha.
• HYVs aim to raise this number on the same land.

The HYV package: the seed alone is not enough

• An HYV seed performs only when the whole package is present:
• the right doses of chemical fertiliser;
• pesticide, because HYV crops are more prone to pest attack;

• assured irrigation, from canals or tubewells.

• NCERT (Class 11, Indian Economy 1950–1990) says that "the application of these inputs in correct proportions is vital".

• Without the package, the gain is lost:
• with too little water or fertiliser, the HYV does not give its high yield;
• without pesticide, pests can destroy the crop;
• so the farmer may spend more money and still get little extra grain.

Main HYV seeds of the Green Revolution

• Wheat: Norman Borlaug bred semi-dwarf wheat in Mexico [4].
• India imported his varieties Lerma Rojo 64-A and Sonora 64 in 1965-66.

• In 1966, M.S. Swaminathan persuaded the government to buy 18,000 tons of these Mexican high-yielding seeds [3].

• Rice: IR8, from the International Rice Research Institute (IRRI), Philippines, was released in 1966. It was often called "miracle rice".

What decides how much HYV seeds deliver

• Irrigation and credit. Farmers need water and money to buy the inputs.
• Seed replacement rate (SRR): the share of a crop's area sown with certified or quality seed, not seed saved from the farmer's own last harvest.
• SRR = (area sown with certified or quality seed ÷ total area under the crop) × 100, for one season.
• Worked example: 30 ha of a 100 ha paddy area is sown with certified seed. The rest uses farm-saved seed. SRR = 30 ÷ 100 × 100 = 30%.

• Why it matters: farm-saved HYV seed loses vigour (strength) and purity over time. A higher SRR means more of the HYV's full yield is reached.

• Research and extension.

• Research means creating new seeds and methods.
• Extension means taking that knowledge to farmers through field staff, demonstrations and training.
• NCERT notes that both lost government funding after the 1991 reforms.

In India

• Programme: the High Yielding Varieties Programme (HYVP) began in kharif 1966. It spread HYV seeds together with their full input package.
• Political push: C. Subramaniam, Union Agriculture Minister from 1964 to 1967, supported the seed imports and the institutions needed to back them.
• Scientist: M.S. Swaminathan tested the Mexican wheats in Indian conditions. He found them high-yielding and disease-resistant [3]. He is called the "father of India's Green Revolution" [3].
• Institutions behind HYVs:
• ICAR (Indian Council of Agricultural Research): the top body for farm research and education.
• State agricultural universities (SAUs), such as Pantnagar (1960) and PAU Ludhiana (1962). They follow the US land-grant model, which puts teaching, research and extension in one university.
• National Seeds Corporation (1963): multiplies breeder seed (the first small stock of seed from scientists) into large amounts and distributes it.
• FCI and the Agricultural Prices Commission (both 1965): procurement and MSP (minimum support price, a price the government guarantees to farmers). A sure price gave farmers the confidence to spend on costly HYV inputs. The APC is now the CACP.

• Rural electrification powered tubewells, which gave HYVs the assured irrigation they need.

• Results:

• Wheat output rose from 12 million tons (1964) to 20 million tons (1970) [3].
• India was self-sufficient in food by 1971 [3].

• Latest: food-grain output reached a record 357.73 million tonnes in 2024-25. This included record rice output of 150.18 million tonnes and record wheat output of 117.95 million tonnes [5].

• Unequal spread at first:

• Farmers with larger holdings, tubewells and access to credit adopted HYVs first.
• Small and rain-fed farmers were left behind at first.
• Punjab, Haryana and western UP moved ahead of other regions.

Don't confuse with

• IADP (1961) vs HYVP (1966): IADP came before HYV seeds. It gave a package of credit, seed, fertiliser and extension for traditional seeds in a few districts. HYVP (kharif 1966) was the programme that spread HYV seeds.
• HYV seed vs certified seed: HYV describes the type of seed, bred for high yield. Certified or quality seed describes the quality of a seed lot. Farm-saved HYV seed is still HYV, but it loses vigour over time. SRR measures the share of area sown with certified seed.
• HYV seeds vs GM seeds: HYVs were made by conventional breeding (crossing plants and selecting the best). GM (genetically modified) seeds are made by putting a specific gene directly into the plant.
• Borlaug vs Swaminathan vs Gaud: Borlaug bred the semi-dwarf wheat and is the "father of the Green Revolution" [4]. Swaminathan is the "father of India's Green Revolution" [3]. The term "Green Revolution" was coined by William Gaud (USAID) in 1968.

Prelims Hooks

• HYV seeds need fertiliser + pesticide + assured irrigation in correct proportions. HYV crops are more prone to pest attack.
• Semi-dwarf stems prevent lodging (the plant falling over) when heavy fertiliser is used.
• Lerma Rojo 64-A and Sonora 64 were Borlaug's Mexican wheats, imported in 1965-66. IR8 rice came from IRRI, Philippines (1966).
• IADP 1961 → IAAP 1964 → HYVP kharif 1966. Only HYVP spread HYV seeds.
• National Seeds Corporation: 1963. It multiplies breeder seed and distributes it.
• Seed replacement rate = (area sown with certified or quality seed ÷ total crop area) × 100.

Mains Points

• An HYV is a package, not just a seed.
• It needed irrigation, fertiliser, credit, MSP and procurement to work.
• This explains its success: food self-sufficiency by 1971 [3] and a record 357.73 million tonnes in 2024-25 [5].

• It also explains its limits. The gains went first to irrigated, better-off farmers and to Punjab, Haryana and western UP. This widened the gaps between farmers and between regions.

• The next rise in output must come from each hectare.

• Net sown area has stayed at about 140 million ha [2][6]. So growth must come from higher yields and higher cropping intensity (155.4% in 2021-22 [6]).
• This calls for short-duration HYVs, a higher seed replacement rate, more irrigation, and renewed research and extension, which lost funding after 1991.

• A "second Green Revolution" in rain-fed and eastern India needs varieties that suit those regions.

• The HYV paddy-wheat cycle has a cost (GS-III).

• Double-cropping in Punjab-Haryana, supported by MSP, free power and fertiliser subsidies, drains groundwater and damages soil.
• It also leads to stubble burning.
• This links to the current debates on crop diversification and on reforming farm subsidies.

Related concepts

• Green Revolution
• Research and extension
• Farm mechanisation
• Crop yield
• Seed replacement rate
• Kharif crops
• Rabi crops
• Zaid crops
• Multiple cropping
• Net sown area

Read more

• The Green Revolution: the HYV package, institutions and the crop calendar