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Dave: My farming days were spent farming on both sides of a limestone plant. Even though I was that close to the deposit, lime deposits in the rocky hills almost adjacant to my fields, yet none of it spilled over into the farmland around it. That farmland had a naturally low ph thus lime was necessary and in quite heavy applications. They do dry lime for bagging and it is an expensive process. Dried lime will work well in Eeze Flow type spreaders. The only spreaders I know of that work well with bulk lime are the hopper type with endless belt bottom to deliver the lime to the spinners. Most of these were 10 to 12 feet long and about 6 to 7 feet wide at top. To be successful the belt had to be at least 3 feet wide, as bridging is a real problem with moist lime. I had one of these type spreaders on my farm and with a 50 hp tractor and good loader one could spread 300 to 400 ton per day. Skidsteers worked the best for loading as you could watch closely to see that you didn't pick up stones or sod. Care had to be exercised on where trucks dumped the lime. Stones were hard on the belt and as I recall in the 70s the belt for my spreader was $600. I did a lot of custom spreading, and because farmers and truckers wouldn't exercise care where dumping, we went to hauling the bulk lime on 40' flat bed trailers with 4' side boards. We hauled two 15 ton piles one on each end of trailer leaving space in center for skidsteer to start loading from. Bulk lime has to be kept moist to keep it on trucks for delivery. As you can see this is a high capital investment job best left to custom operators geared up for the job. Since my farming days, I remember once going to lime plant with a light truck for 5 ton of dried lime in bulk to use around my new lot, and spread in an Eeze Flow. I saved the cost of bags and bagging, but then I spread lime all the way from lime plant to home, got saturated with lime shoveling it to the Eeze Flow. My good wife said my clothes were worse than when I had spread 400 ton of moist bulk lime in a day. My advice is get a custom operator. If that is not an option I'll give you a tip on how my dad did it in the 50s. Fill the manure spreader about 2/3 with well rotted manure. Then depending on how much lime you wish to apply, shovel a 2" to 6" layer of lime on top of the manure. The manure spreader will do fine with the layer of manure on bottom. Keep the total load about 3" below top of side boards. Remember lime is much heavier than manure, the spreader will not stand large loads.
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