Samantha Tennent was in the United States last month on an International Federation of Agricultural Journalists (IFAJ) Alltech Young Leaders programme. Photo / Supplied
Samantha Tennent pulls on a yellow hi-vis vest before entering a barn the size of eight rugby fields.
The sprawling shed west of Willmar in the United States' state of Minnesota houses 9500 dairy cows and is owned by Riverview LLP.
A truck mounted with a red Supreme feed processor drives down one of the shed's 12 lanes, spitting out a mixed ration to waiting cows.
This is dairy farming on a massive scale.
The cows are milked twice a day through a spotless 106-bale De Laval rotary milking shed, which spins for 22 hours a day.
Three staff work at the cups-on area. One sprays each udder with disinfectant, another wipes the teats clean and a third secures the suction cups onto the teats for milking.
Tennent visited the United States last month as part of the International Federation of Agricultural Journalists (IFAJ) Alltech Young Leaders programme.
The trip included a leadership boot camp, attendance at the IFAJ's annual congress and several field trips.
One of the tours was to Riverview LLP-owned Louriston Dairy. Forty staff are employed to milk, feed and care for the farm's 9500 cows.
The herd is more than 40 times larger than the average US dairy operation.
It is part of a network of giant farms built and run by Riverview LLP in Minnesota, South Dakota, Nebraska, New Mexico and Arizona.
The company owns 92,000 dairy cows, according to the Star Tribune newspaper.
"It employs about 1200 people. Once you've worked on one of the farms for two years you can buy shares in the business," Tennent said.
Louriston Dairy was built in 2017, reportedly costing $US50 million. Construction took eight-and-a-half months and involved large earthmoving equipment.
A concrete pad, which is covered with two massive stacks of alfalfa (lucerne) and corn silage, sits alongside the barn.