5 bottom plow

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I went to a tractor pull last night that had plow classes. I am confused as to why John Deere made a five bottom plow before 1959 as they did not have a tractor to pull one. At the pull I attended all of the 720 and 730 John Deere's pulled in the four bottom class along with 88 Olivers and 400 IH and Case 400 and DC's. Is that really all the 730 JDs can pull is four? I have a lot of ads from JD marketing the 720 and 730's as 5 bottom tractors, what gives?
 
Those were often 14" plow bottoms. A lot depends on the type of soil they were used on. Stubble on sandy soil will pull a lot easier than in sod on heavier soil. A 730 would pull 4-14's in "most" soil conditions. An 830 5-14's.
 
In general, when we used plows, we could pull one more bottom in in the spring than we could in the fall. If we were plowing established alfalfa sod, it was one less or shift down. I agree that "plow ratings" of tractors were usually pretty optomistic.
 
Try plowing for potatoes it takes a pretty good 720 or 730 plowing 8 to 10" deep with 3X16's at a pretty good clip and a 820 or 830 with 4X16's after one season the left fender paint is worn from hanking on because the furrow is so deep. The point I'm making is it just depends on the conditions. In the early 1960's John Deere introduced the 8010 sporting an 8X14 fully mounted plow at Farm-O-Rama which equates to roughly a 6X18 plow the 8010 was around 165 to 170hp pretty much the same as today's tractors at MFWD. It's all relative.
 
I pulled a 5-14 Deere plow with a 730 Diesel for years-8-9" deep. A neighbor plowed with a Caterpillar.Some soils pull a lot easier that others. Nuff said.
 
An 830 will pull 5 bottoms also Deere plows were used behind Cats in the western wheat areas. They could pull 5 or more bottoms.
 
You will see a big difference in what kind of plow a tractor will pull when you travel from one area to another. Also some sod is a very hard pull and after farming a few years it is much easer.
 

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