First we have to determine what it is you want to do or what your problem is....plant thicker or thinner or are you having "stand problems" with skips or doubles?
Both 16 and 24 cell plates "will both work" in your planter. This question/answer is not your solution and is adding to the confusion.
Most sweet corn kernels are not sized uniformly like hybrid kernels...sweet corn kernels are usually very "wrinkled" and run smaller than hybrid kernels; so sometimes you just have to lay a plate on a bench and see how the kernels fit into the cell openings. This should help if you are having skips or doubles. Don't do this by holding the plates in your hand, lay them down on a flat surface, otherwise you are adding cell depth variations making matters worse.
Thru the years, most 2 row planters were set for 16 cell plates as those planters were built when seed populations were much lower; when 4 row planters came along and pops were starting to go higher, the operators often (but not always) set the sprockets for 24 cell plates so as to get the population higher. Your operator's manual is needed here for proper sprocket settings.
You are now using 16 cell plates, and your seed dealer says to use 24 cell...WHY? If you just throw in some 24 cell plates your pop will increase 50%!! I doubt if you want to do that since you go that high and you will have nothing but "nubbins" for ear size but you sure will have lots of them!
However, if you are having "seed stand" problems with seeds maybe too large or too small for the plate you are using, then you just simply need to use a larger or smaller cell size.
Sometimes plastic plates get worn too thin, you have to compare to a new or newer plate to determine this. This can affect plantability also.
Here are the 16 cell plates in descending order of cell size from larger (top) to smaller:
C11-16(very large)
C7-16
C7-16X
C65-16
C6-16
C10-16
C697-16
C17-16
C9-16
C90-16
C190-16(very small cell)
If cell sizes are your problem or cure, stay the heck away from 24 cell plates. If you want to go to higher pops then get out your operator's manual, read the directions for how to set the sprockets (both driver & driven) for 24 cell. You DO have a manual, don't you?
LA in WI
PS Lincoln Ag has all these plates; www.lincolnagproducts.com or 402-464-7657. (No, I do not work for them.)
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