USSR study:

“The food and animal crop resources of the USSR would have to be damaged within a single growing season to the extent necessary to reduce the present average daily caloric intake from 2800 calories to 1400 calories, i.e., the starvation level.

Reduction of the food resources to this level if maintained for 12 months would produce:

20% fatality fate

Decrease manual labor performance by 95%

Clerical and light labor by 80%"

Lab 257