What was identified as the principal obstacle in the way of agricultural growth by the First Five-Year Plan?

The pattern of land distribution in the country.

The First Five-Year Plan sought to get the country's economy out of the cycle of poverty. K.N. Raj, a young economist involved in drafting the plan, argued that India should ‘hasten slowly’ for the first two decades as a fast rate of development might endanger democracy. The First Five Year Plan addressed, mainly, the agrarian sector including investment in dams and irrigation. The agricultural sector was hit hardest by Partition and needed urgent attention. Huge allocations were made for large-scale projects like the Bhakhra Nangal Dam. The Plan identified the pattern of land distribution in the country as the principal obstacle in the way of agricultural growth. It focused on land reforms as the key to the country’s development.