This document discusses the three sectors of the Indian economy: primary, secondary, and tertiary. It notes that historically the primary sector was most important but over time the secondary and tertiary sectors have become more prominent. While their share of GDP has increased, the tertiary and secondary sectors have not absorbed as many workers as the primary sector. As a result, there is underemployment in agriculture. The document suggests ways to generate more employment, such as investing in irrigation, transportation, credit, and industries in rural areas.