What is the role of agriculture in economic planning?

Importance  of agriculture in the national economy is indicated by many facts.  For example, agriculture is main support for transport sector as railways and roadways secure bulk of their business from the movement of agricultural goods.  Further it is seen that good crops implying large purchasing power with the farmers lead to greater demand for manufactures and therefore better prices.  In other words prosperity of farmers is also the prosperity of the industries and vice-versa. Agriculture is backbone of the Indian economy and the prosperity of agriculture can also stand for the prosperity of the economy.  At the same time it is true that per capita productivity in agriculture is less than in the industry.  Many scholars think that so long as the Indian Economy is dominated by agricultural activity,  per capita income will not rise to an extent, which is necessary and desirable.