'Agriculture is the backbone of Indian economy'. Substantiate this statement

Agriculture is the backbone of Indian economy. It includes all those activities which are related to the cultivation of land for production of crops i.e., food crops (rice and wheat) and non-food crops (jute and cotton).
The Eleventh Five Year Plan (2007-12) emphasises that agricultural development is necessary for rapid economic development of the country.
The main features of Indian agriculture are :
(i) Agricultural output depends largely on rainfall and other natural factors like floods,droughts, storms, etc.
(ii) The historical, social and cultural background of state affects agricultural output.
(iii) Over three-fourth of land holdings are of small size. Thus, agriculture is a source of livelihood for poor farmers