UK Agricultural Output Nearly 50% Higher than in 1973

According to statistics released by the Department for Environment, Food & Rural Affairs (DEFRA) in November 2014 the UK's agricultural productivity is on an upward trend:

Source: DEFRA stats

The figures are a measure of total output (cereals, industrial crops, forage plants, vegetables, potatoes, fruit, livestock meat, other livestock products like milk and eggs etc.) divided by the total amount of resources to produce them (labour, energy, animal feed etc.),

The result is that 2013 productivity is 47% higher than it was in 1973.