Which of the following periods is known as the first Green Revolution period in India?

·        Expansion of irrigation infrastructure through the construction of dams, canals and tube wells, allowing for better control of water resources and increased crop cultivation.

·        Promotion of agricultural research and extension services to educate farmers about modern practices and technologies.

·        Government support through policies and subsidies to encourage farmers to adopt the new agricultural practices.

·        Substantial increase in food grain production, particularly in wheat and rice, leading to food self-sufficiency and reduced dependence on food imports.