One of the largest annual costs on South Dakota farms and ranches today is that of owning and operating machinery. Total costs associated with farm machinery have increased as farm operators have expanded their operations and substituted machines for labor. This trend does not appear to have run its course because new and larger machines are continuously being developed and adopted. Along with these changes have been corresponding increases in productivity per worker, average farm size, and total machinery investment. In many cases, increased investment in machinery has occurred at the expense of operating capital. Farmers have had to invest heavily in modern machinery without being able to expand production enough to justify the added inve...