| Answer» Contribution of agriculture in national income: Agricultural sector is called primary sector and so income earned from this sector is also knQWn as income from primary sector.Primary sector includes agriculture crops, poultry farming, fisheries, cattle rearing, etc.As per economic survey of 2011 -12, in 1950-51, the contribution of agriculture sector in national income (GDP) was 53.1%.This has constantly decreased because of more focus on industries and less on agriculture.In the year 2011-12 it decreased to as low as 13.9% (at constant prices).Fast rise of other sectors namely, industry and service the is one of the key reasons for reduced contribution of agriculture to such a great extent.
 | Year | Share of Agricultural Sector in National Income (in percentage %) |  | 1950-51 | 53.1 |  | 1960-61 | 48.7 |  | 1970-71 | 42.3 |  | 1980-81 | 36.1 |  | 1990-91 | 29.6 |  | 2000-01 | 22.3 |  | 2011-12 | 13.9 | 
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