Farming is less than 1% of human activity currently.
But 150 years ago—and for 10,000 years before that—farming employed 90% or more of the workforce in every country.
Compare the yields from India to best-in-class producers of the same products [1]. For the top 5 products (excluding Buffalo milk) Indian production is 70% less efficient. (Buffalo milk is excluded because I don't have a source for best-in-class production.)
[1] https://en.m.wikipedia.org/wiki/Agriculture_in_India Largest agricultural products in India by value