with a engine, pretty much just like a car just transformed into a huge monster.
Farm tractors are designed and built for that type of work.
The type of work you will be needing the tractors for will influence the number and type of tractors necessary for you acreage. johndeere.com is a good resource for their many different tractors.
4.4 days of work
5 years
6.7 you're welcome
Assuming that they work at the same rate, then 2 2/3 days.
Pedal tractors are not a farm implement and therefore are not used by farmers. They are a ride on toy version of tractors that uses pedals in the same way that tricycles work. You can still buy them for your children.
There are two main types of tractors that are used. These tractors are large farming tractors and small personal tractors.
It's based on the revolutions an engine makes.
Three times the tractors take three times less 3 x 6 = 18 11/3 = 3.67
Yes - tractors were rare.
Stewart & Stevenson work on tractors. Call them at 1631 Chalk Hill Road, Dallas, TX‎ - (214) 631-5370‎