What do economists consider as an important failure of policies during 1950-1990?

Excessive government intervention in agriculture. Inability to create non-agricultural employment opportunities. Inefficient use of irrigation facilities. All of the above

Inability to create non-agricultural employment opportunities.

An important failure of the policies followed during 1950-1990 was the failure to create employment opportunities in the industrial and service sectors for the agricultural workforce. This implies that the policies did not effectively address the issue of unemployment and underemployment in the country.