HP needed for different disk types

Karl Kostman · Apr 12, 2020

Hey folks I found on the site that it appears an average of HP needed to pull a disk is about 5 per ft of disk, I am using a JD 730 diesel Row crop which puts my disk width at 12 ft. I am disking CRP land that is very overgrown with years worth of very heavy grass so I was thinking of renting a two way disk which I think would help to did down deeper in one pass than a standard type disk, if I did this would my HP requirements change much? And if your experience what is the best type of disk to use in this type of situation?
I need to do around 40 acres in this first batch.

Suggestions?
Thanks much
Karl

moresmoke · Apr 12, 2020

The power needed will correspond to the weight of the disk more than anything. An old school tandem disc really does not take much power to pull. But
a Wishek type offset, your 730 would be loaded before you even dropped it on the ground.

I can?t say what will work for you, but you may want to include a location, as conditions and practices vary widely.

Janicholson · Apr 12, 2020

Disking as a first tillage in sod, takes more like 10 to 15 HP per foot. Cutting less than 4 inches deep just does not
reduce weed killing action needed. A two way disk can be loaded to cut as you need. it will be a serious drawbar pull. Jim

jon f mn · Apr 12, 2020

With a heavy offset or one way 8' is going to be a load for
your tractor.

Wicksfield · Apr 12, 2020

I'm afraid any disk that a 730 could pull will not touch heavy, overgrown grass. Reconsider and think about putting a mower on
the back of your 730.

jddrawbar · Apr 12, 2020

We pull a 8' Taylor-Way heavy off-set with my 730 standard, it has 23.1x26 deep rubber & wts.. 2nd gear and it is rolling the black smoke. Had the tractor almost 50 yrs. & the disc for about 30 yrs.. Heavy black gumbo.....I pull the same disc with a R & 830 and it's a good workout for both. All that said, your row-crop would be loaded & most likely not enough traction.

fixerupper · Apr 12, 2020

What kind of soil are you working with? How heavy is the overgrowth, this can be deciphered differently in different climates and soil types. Where I live in northwest Iowa the CRP might be on heavy black soil with a mat of brome grass a disk would have a heck of a time penetrating well enough to be called plowing. In the CRP on my farm a 4-14 s plow would be a big load for a 730. I dont know how that translates to a heavy disk but I have a hunch a plowing disk not much wider than a plow will be all a 730 can handle. Established CRP in western Kansas you could walk away with 4-14s.

VicS · Apr 12, 2020

Best deal is to bush hog it. Then spray
it. Then disk it. A 730 will pull a 8ft.
Rome one way disk. With like 1/4 X 24"
notch blades. 2nd gear. Have fun! I
bushhoged mine and dug the worst russian
olives. Out with a backhoe. Then no-tilled
it to corn. Just had 7 acres. Wish you the
best.

tomNE · Apr 12, 2020

I'd come up with a completely different strategy that didn't involve using a disc! That soil has been in CRP to heal up what discing did to it, why would you
go back to the way the ground found it's way into crp! Good ground never qualified for CRP, so it had major problems just to get into the program!

WGM · Apr 12, 2020

i am required to disc my CRP ground only if I decide to re-seed it. I decided to mow it instead, one third every year.

aFORDable · Apr 12, 2020

What's the plan with the 40 acres? If it's row crop I'm with the others in that you will have a very hard time getting it worked down. Is burning possible to get rid of the overgrowth? I had to kill down some CRP ground a few years ago and then burn it off to get it tillable. You'll burn lots of fuel trying to get rid of the overgrowth with likely limited success. But to answer your question a two way disk of most any size will work a 730 hard or at least it would in my soil with overgrowth.

jimmyjoe · Apr 13, 2020

425 HP on a 18 foot.

HP needed for different disk types

Karl Kostman

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moresmoke

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Janicholson

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jon f mn

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Wicksfield

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jddrawbar

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fixerupper

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VicS

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tomNE

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WGM

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aFORDable

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jimmyjoe

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