Hiring custom work and machinery is an important means of cutting machinery investment and cost on Iowa farms. It is particularly advantageous on farms without a large acreage over which to spread fixed costs.
Armstrong, Ray E. and Hull, Dale O.
"Farm Custom Rates for 1955,"
Iowa Farm Science: Vol. 9
, Article 4.
Available at: https://lib.dr.iastate.edu/farmscience/vol9/iss7/4