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| The offset openers do not push the soil over as far when making the trench, so the soil is not packed as hard. This makes is easy to have trailing disks follow to close the trench, then have the rubber wheel pack it down to get good seed to soil contract. The bad part about this, if you plant in soils that are (too) wet, when opening, the soil gets packed too hard and the closing wheels don't do a good job of pushing the soil back to the seed. The when the soil dries out, the trench opens back up and you can see the seed sitting in the bottom of the trench. If you plant it fair to good conditions it works well. If you plant in wet conditions, it is horrible.
One the other hand, the side by side discs push the soil further, so unless the soil conditions are fairly dry, they will pack the soil in the sidewalls. Closing discs do not work well to bring the packed sides in, so a large fat disc is used to try to break up the side wall and press it around the seed. It kind of works, but not very well. There are hundreds of aftermarket closing systems that attempt to work better. Smooth discs, plastic disk, rubber discs, disks with spikes, disks with twisted spikes, all kinds of aftermarket options are available. Some work better for some conditions, but none work for most conditions.
The trailing guage wheels seem to be a better design as well, as other have pointed out.
Its amazing to me the size of the business that was started based on fixing things on the green planters that wasn't a issue with the red. | |
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Case IH planters
