The economic ideas of 1950–1990: the goals of planning, land reforms and the Green Revolution, marketable surplus, the industrial policy, small-scale industry, and tariffs and quotas.
| Marketable surplus | output − family use − seed kept |
| Extra output from HYV seeds | area × (new yield − old yield) |
| Land above a ceiling | land owned − ceiling |
| Price with a tariff | world price + tariff % of it = price × (100 + tariff) ÷ 100 |
| Share of GDP | per cent × GDP ÷ 100 (industry about 13% in 1950–51, 24.6% in 1990–91) |
| Key years | Planning Commission 1950; Karve Committee 1955; Industrial Policy Resolution 1956 |
A land ceiling of 20 hectares is fixed. 5 landowners hold 28, 48, 53, 59 and 52 hectares. How much land in all is above the ceiling, and what is the aim of a ceiling?
Working: (28 − 20) + (48 − 20) + (53 − 20) + (59 − 20) + (52 − 20)
Answer: 140 hectares; to reduce the concentration of land ownership in a few hands