The Jang Precision Seeder is a highly accurate single row seeder. It is an awesome bit of kit that turns seeding a bed of carrots from an hour job to a 5 minute task. With the Jang correctly calibrated / set-up the spacings of seeds are perfectly planted and there is no need for pruning out seedlings that are too close together or worrying about seed depths.
However the Jang Seeder can be a little bit confusing at times if you aren't used to calibrating it and aren't sure what settings to use for which crop / seed.
This guide will show you what configurations to use for which crop, how to adjust those settings and our recommended spacings too. We hope you find this useful and can use it as a reference across the season.
How to Calibrate the Jang Seeder
To make sure that the Jang Seeder is as precise as it can bem it has a larger amount of areas you can calibrate than some of the other seeders on the market. Here are the main ways to setup or calibrate the seeder:
1.) Seed Rollers:
The main way the Jang Seeder is callibrated for different seed sizes and spacings is with the seed rollers. You are required to buy the seed rollers you need separately and select which ones are right for your seeds. The rollers have depressions in them that are different sizes for different seeds, and the depressions are spaced differently around the roller for different distribution of the seeds.
To change the seed rollers you simply lift out the hopper.....
You can look through the full list of seed rollers to buy here: https://reagtools.co.uk/collections/jang-jp-series-seed-rollers
2.) Drive Chain Gears:
The Drive Chain Gears are provided as standard equipment with the seeder in order to set the spacing for spot seeding. You can remove the chain and change the gears on the front and back to set the spacings.
This is easily done by removing the drive chain cover by loosening the two white screw heads by hand, and carefully removing the cover. The chain can then pop out and the new gears be changed, ensuring the metal chain guide is kept in place.
3.) Planting Depth:
Planting depth is easily set by loosening a bolt on the plough assembly and tightening when the required depth is reached.
4.) Soil Coverage:
The quantity of soil covering the seeds is equally easy to set by modifying the angle of the soil cover plate.
Calibration of Seed Rollers and Chains for each Seed:
So now you know how to change the different settings, you now need a reference for what settings work best with each seed and its spacing. This is what we have used for the last few seasons and it has been tested well, however your soil and conditions may be different. So please use this Jang Seeding Guide as a reference but enjoy playing around and testing with your soil and growing conditions:
These are the crops that we direct seed using the Jang and therefore the settings we use for them. If you have any other crops you prefer to direct seed and would like to know the settings then please do get in touch.
If the table above is a bit confusing, check out this video on how to use it:
These settings are setup for the Jang JP-1 Seeder, however you can mirror them to the multiple row Jang Seeders too.
If you don't have a Jang Seeder, check them out here: https://reagtools.co.uk/collections/jang
Here is the full user guide provided by the manufacturers of the Jang Seeder: https://reagtools.co.uk/blogs/instructions/jang-jp-01-instruction-booklet