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Implement Alley Discussion Forum

can I get away with 28 ?

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Craig in MO

11-22-2006 09:59:20

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Thanks, everyone. I am refurbing the planter so I think I will reassemble at 28 or 30". The minimum setting is 28". That will work I guess with the 30" combine heads and give me a few extra rows to boost the yield.

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Leroy

11-27-2006 04:59:35

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Re: can I get away with 28 ? in reply to Craig in MO, 11-22-2006 09:59:20

Stay with the 30". To go to 28" you have to have the small straight sided seed hoppers to clear the tires on the outside rows, the inside rows you can have the standard seed hopper. Also the markers if it is a 40" setup planter will not adjust to a 30" row setup without cutting and welding, also from a 30" setup markers cannot be made to work on wide row settup. My corn head is a JD 3 row and is set for 30" rows (Book says it can be set for 28" or 32" by changing the snapping roll setting {A week long job} but you do not change the width of the header so you are running tight to the next row on the outside with the 28" setting). I have 3 of the 494 and 1 494A planters here. A few of the earlier model planters had the narrow axle that you could set the planter to 30" rows with the standard seed hopper but you still had to have the straight sided seed hopper to get to 28" rows. With the standard axle for 30" you still needed the straight sidded seed hoppers for tire clearance. With planter in tha raised position will look like the standard box will work but when you drop planter the seed boxes will jamb against the tires. Now on the latest planters they had an adjustable axle that you could set for from 42" to 30" rows with standard seed boxes but for 28" you still needed the small seed box.

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El Toro

11-22-2006 13:32:46

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Re: can I get away with 28 ? in reply to Craig in MO, 11-22-2006 09:59:20

I would use the 30" spacing. You should contact the couny agent in your area on doing a soil analyis on your field. Have this completed before its time to plant. They can tell what your soil requires for growing corn and the amounts of lime and fertilizer to apply. In my area they spread the lime with a big lime truck
right on the field and it doesn't take them very long. Hal

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Gerald J.

11-22-2006 11:15:44

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Re: can I get away with 28 ? in reply to Craig in MO, 11-22-2006 09:59:20

If you plant a fixed ear corn thick enough it tips back an inch, more plants from more rows or greater population won't increase the yield. Flex ear corns don't give such a clear indication of corn plant exceeding nutrition but they do some. You can often get greater yield with a flex ear than a fixed ear with the same nutrition (including water), but you can't forecast water accurately and more often its the ultimate producting limiter.

The next questions to be solved are what are you putting down for NPK and what PK and pH is the ground now? Corn has to be fed. Then too what is the previous crop and how did it yield. That affects what you have to apply for a good corn yield. And then another consideration is what time of year are you going to put down the N and in what form? There is extensive reports on using limited N applied timely at http://www.isafarmnet.com/

Now you still have to choose a corn variety, you need about 3 sacks (for 32,000 per acre) and there are only about 5000 numbers to choose from.

Gerald J.

Iowa soybean association nitrogen studies

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Errin OH

11-22-2006 10:54:48

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Re: can I get away with 28 ? in reply to Craig in MO, 11-22-2006 09:59:20

I think you need to back up a bit. Closer spaced corn is going to require more inputs. Just planting narrow and expecting more is going to leave you sorely disapointed. If you plan to spray and do a couple fert runs (plant +1) 30" would do Good. Likely could get away with 28. If you just plan to plant (with fert) and not really following up, well its not going to do as well and you would be waisting your time with 28.

As to the spacing, How many rows is the combine? At two rows, 28 vs 30 (1 inch off center both rows) is nothing. If they show up with and 8 row head your screwed. The center two would be an inch, the next two would be 3", the next two 5", the two outside rows would be 7" off. You could get in at 3" (leaned over real good) but the outer rows (5&7) may or may not depending if the stalk breaks or not. Read, Added Loss, making your narrows rows mute.

Match planting to harvesting..... .

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