In a normal planting operation, (when not using presswheels)
the seed is normally covered by loose crumbly soil, only
a small portion of the seed may be coming in direct contact
with moist soil. Extending the germination time, the loose
soil is also drying out quicker than if firmed.
When conventional planting not using Presswheels, you run
the risk of the seed bed being compressed or smeared.
using incorrect or worn points resulting int he roots not
being able to penetrat the compacted, smooth/glazed
trench. (The root system will take the easy way out and
send the roots along the seed trench rather sending
its laterals). This will potentially increase the risk
of lodging and will also reduce the potential crop
not maximizing the soil nutrients and moisture.
By using a presswheel to firm the moist soil around the
seed you are achieving a few important things.
1. By getting full seed/soil contact
the seed will germinate 3 to 4 days quicker than conventional
When using Presswheels you will always get a better
root establishment ie. with the soil evenly firmed around
the seed it allows the plant to get a better root establishment
being able to send its roots out in all directions, optimising
soil moisture hence better plant stand, better yield and
less chance of crop lodging.
3. By getting a quicker germination the
seed will also take more advantage of the moisture to get
a better root/plant establishment.