The large rocks are the size of boulders. Our dozed couldn't move them. The smaller softball size rocks constantly get uncovered due to the 200 inches of rain a year. That's one of the reasons for mowing so often so you can see the rocks and avoid them.
So is the upper picture considered the hammers?
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Yes it is their type of flail hammer knife for their flail mowers:
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Before you go and spend your hard earned money that will not be back in your pocket:
I would rather see you invest in the boom type flail mower; either a Del Morino, Maschio or Peruzzo.
The reason why is they are more veratile and can be used to mow vertically to keep berry hedges and vine rows in check and even. AND they can be moved side to side quickly as well as mow directly behind the mule you are using.
I will be adding more information in a minute or two.
Iowa Farm Equipment
Iowa Farm Equipment has a wide variety of flail mowers of various types as well as other farm equipment.
- CUMMINGS & BRICKER, INC.
Cummings and Bricker is the eastern US distributor for Del Morino boom flail mowers.
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With your boulder problem it may be best to simply mark them with a 6 foot heavy Tee Fence post and bypass them for now.
Stay with me now; in saying that when you have a large quantity of said boulders identified and marked that is the time to act and remove them.
PLEASE DO NOT YELL:
Hiring a tracked back hoe for a half day or a day to dig them out would benefit you as the boulders as they work very quickly:
1. have been identified and marked with a heavy six foot tee post as a danger.
2. you always know where they are until you have them removed.
3. a tracked backhoe will dig around and pull out the boulder with its thumb attachment.
the boulder could be carried away by you at some other time.
4. the hole can be back filled with bank run gravel or sand.
5. the tee fence posts marking the boulder locations would be pulled when the boulder is
removed and only when it is removed.
6. the Tee Fence posts would be pounded back in the ground to mark the hole unless you are
immediately ready to back fill the hole the boulder removal created.
7. The cost of the hired backhoe and purchase of gravel or sand can be deducted as a
business expense.
If you are running a hobby farm the expense would be hard to deduct unless you have a solid revenue stream from it annually.
I would rather see you invest in an Italian made boom mower for your needs as it will be much more versatile using it especially in vertical mowing for the berry hedges and your grape vines to make the berry hedges more dense and productive.
Please don't yell; I know its your hard earned money. I would like you to examine the boom flail mowers I described and provided links to for you as a boom mower will be of much more use to you and save you time and labor.