I have had dry fertilizer on two John Deere 7000's I purchased over the years and put a dry fertilizer attachment on another John Deere 7000 I used most recently. If you are going to put dry fertilizer on a 7000 I would recommend you put the regular Deere attachment on. That way you would have all of the dealer support for parts and the manual would give you the approximate application rates per acre. The dry attachment I put on was sitting in a shed and hadn't been used for several years as the farmer had went to all broadcast fertilizer. I might have paid $500 for the complete attachment minus the openers. Purchased new from a dealer would be EXPENSIVE. I now run a Kinze planter with the dry fertilizer units. Very similar to the John Deere set up. Actually the first Kinze dry units back when Kinze first started were from Allis Chalmers planters. The augers that pulled the fertilizer were like springs which rotated. Kinze eventually went to their own cast iron augers like used in a Deere. I have the dry fertilizer blended by my ag center and delivered to the farm. They auger it into a pretty large gravity wagon (believe it holds 13 ton of dry) with a hydraulic auger on it. Using soils tests I typically apply 200 to 300 pounds per acre with the planter when planting corn. I fertilize for two crops - so the soybeans get the residual fertilizer for the next year. Generally use 50% 0/0/60 and 50% 11/46/0. Been adding a little gypsum to the mix to add a little sulfur and calcium. Added some urea this year to jump the nitrogen some as well. Anhydrous is applied pre-plant for primary nitrogen source. I like using dry fertilizer applied with the planter as I feel I get a "starter" effect and the fertilizer is "banded" which gets less tied up in the soil chemistry and is more available to the plant. Typical research indicates you can use 50% less P and K when banding while maintaining yields. My yield goal is around 185 bushels per acre average on 50 to 85 CSR soils. The hoppers can be found easy enough as well as the coulters. Getting good augers is hard and the transmissions that drive the augers are hard to find and pricey. I don't know where you are at, but Kalsem Salvage at Waterloo Iowa often has some of the parts and pieces needed to put dry fertilizer on a planter. Good luck.
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Today's Featured Article - Third Brush Generators - by Chris Pratt. While I love straightening sheet metal, cleaning, and painting old tractors, I use every excuse to avoid working on the on the electrics. I find the whole process sheer mystery. I have picked up and attempted to read every auto and farm electrics book with no improvement in the situation. They all seem to start with a chapter entitled "Theory of Electricity". After a few paragraphs I usually close the book and go back to banging out dents. A good friend and I were recently discussing our tractor electrical systems when he stated "I figure it all comes back to applying Ohms Law". At this point
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