In which Five Year Plan was the importance of human capital recognized?

Seventh

India recognised the importance of human capital in economic growth long ago. The Seventh Five Year Plan says, “Human resources development (read human capital) has necessarily to be assigned a key role in any development strategy, particularly in a country with a large population. Trained and educated on sound lines, a large population can itself become an asset in accelerating economic growth and in ensuring social change in desired directions.”