What are high yielding varieties (HYV) of seeds?

What are high yielding varieties (HYV) of seeds?

High yielding varieties (HYV) of seeds are those seeds which produce huge quantities of crops particularly wheat and rice. Regular supply of water, maximum use of fertilisers and use of pesticides in an accurate proportion is needed in to use these seeds. Financial resources to purchase the fertilisers and pesticides and to install the required irrigation facilities are needed by the farmers to take full advantage from HYV seeds.