For Junkkari’s S, M and T model seed drills, you can choose between the Combi coulter set, which places the seed and fertiliser in the same row, or the Ferti coulter set, which places the fertiliser between seed rows.
The advantage of the Combi coulter set is not only the lower traction power, but also the rapid utilisation of soluble nitrogen, especially in dry springs. With the Ferti coulter set, you have the choice between a fertiliser disc or a reliable S-spiked fertiliser coulter with a hard-welded tip.
If urea-based fertilisers or nitrogen rates above 120 kg/ha are used for sowing, we recommend the use of a Ferti coulter set to avoid seed scorch.
COMBI
Junkkari Combi coulter places the seed and the fertiliser in the same row. The fertiliser is close to
the seed, readily available. The Combi coulter is Junkkari’s most popular coulter, and the method
has convinced farmers
Benefits of Combi coulter set
The advantage of the Combi coulter unit is the rapid initial development of the plant in a cool
spring, when the soil is still cold, and the nutrients move slowly to the seed. The growth is shown as
deep dark green sprouts.
On light soil types and fields where livestock manure is used, the method works particularly well, because the nutrient amounts used are lower. A start fertiliser can also be placed in the same row, since its fast-soluble phosphorus improves the plant’s growth.
The drill structure becomes more streamlined when separate fertiliser coulters are left out. The
need for machine traction power decreases and the number of wear parts is reduced. The coulter
unit becomes more spacious and it penetrates straw and plant waste better on light-tilled fields.
Split fertilisation
The Combi method is also suitable for split fertilisation. When sowing, 2/3 of the fertiliser is
placed in the soil and surface spreading further focuses fertiliser according to the growing season
and crop. A plant needs most of nutrients during early development and this way they are quickly
available to the plant.
The Combi coulter is available for models S, M, T, D and W. Models D and W are only available
with the Combi coulter.
FERTI
Junkkari drills are also available with a separate fertiliser coulter unit. Fertiliser coulters place fertiliser between every outer seed coulter at 25 cm row spacing. The fertiliser provides power from one row of fertiliser to two rows of seed
Depth adjustment
With separate fertiliser coulters the fertiliser can be placed deeper than the seed row. For example,
seeds are sown at the depth of approximately 3 to 5 cm and fertiliser is placed at the depth of approximately 7 to 8 cm.
Versatility of Ferti
The Ferti coulter unit is a good choice when cultivating in dry clay soil and with a high fertiliser
level. Fertiliser for the entire growing season is applied at once, and split fertilisation is not used.
A Ferti coulter unit can also be used to sow covering mixed crops in organic farming, e.g. pea-oat
crops, where the greatest possible coverage is an advantage against weeds.
A Ferti coulter unit can be supplemented with start fertilisation, which is placed in the same row
with the seeds using a small seed box.
The Ferti coulter unit is available for models S, M and T.