Sunday, 22 September 2013

AERATION WEEK

Work carried out on the Greens during aeration maintenance week, 16th to 20th September. All planned works were carried out during the week although there were some delays to due to heavy rain showers and a longer spell of rain on the Thursday.
The work carried out included the following tasks:
Verti cut all Greens.
Verti draining (aeration)
solid tining (aeration)
overseeding
sand dressing
Below is a breakdown of each task with photo's to help explain each task.

VERTI CUTTING OF GREENS



 
A close up photograph shows a verti cut unit which is attached to the triple greens mower. The three units contain vertically set blades which spin at high speed and scratch at the green surface to a set desired depth. The aim is to remove surface dead and decaying plant material and help minimise the build up of thatch. The verti cutting process is carried out between six and eight times during the growing season.
 
 
 

 
Verti cut units in operation on the greens mower.
 

 

 
VERTI- DRAINING GREENS
 
 

 
The club's 1.5m wide verti-drain


The photo shows 13mm diameter solid tines working to a depth of 200mm (8"). The action of the verti-drain produces heave as the tine enters the green profile, fracturing the soil and relieving compaction built up over the year through foot and vehicular traffic. As well as relieving compaction the aeration work improves surface drainage, allows air exchange between the soil air and the atmosphere. Soil air contains high rates of carbon dioxide produced during plant respiration.
 
 

 
A verti-drained surface.
 
SOLID TINING GREENS
 
 
 

 
A close up photo of the John Deere aercore punch action aerator.
 
The Greens were tined using 9mm diameter solid tines to a depth of 75mm. No heave is produced with this aerator therefore there is no compaction relief. The tines are punched into the surface vertically improving air exchange and surface drainage. The improved air exchange during aeration also provides valuable oxygen for beneficial bacteria and microbes present in the rootzone.
 
 
 
 

 
Verti-draining with the tractor mounted verti-drain followed by solid tining with the pedestrian punch action aerator on the 9th Green.
 
OVERSEEDING GREENS
The Greens were overseeded using the Vredo tractor mounted seeder. The process used is disc seeding where the seed is drilled into the Green surface. The seed is dropped inbetween two angled discs which cut into the surface and release the seed. A roller then seals the seeded slit.
 
The seed used was made up of two species of Fescue (festuca species), Chewings and Slender Creeping Red Fescue. Fescue is the desired grass species on the Greens and forms part of the managent plan for the Greens.
 
 
 

 
The seed is dropped through hollow tubes and released into the angled discs. The roller then closes the seeded slit.
 
 
 

 
 
 

 
A close up of a seeded Green, two passes are carried out.
 


 
 SAND DRESSING GREENS
As explained in this year's STRI report the Greens are now dressed with straight sand. Top dressing improves surface levels, improves surface drainage, helps dilute the accumulation of thatch and helps create dry and firm playing surfaces for the majority of the year. The dry free draining environment is ideal for the germination and establishment of the desired grass species of fescue and Bent.
 
 

 
Sand dressing
A total of 140 tonnes of top dressing has been applied to the Greens this year. This amount is possible because of the use of the new spinner top dresser where the sand is passed through two angled spinning discs which throw the material horizontally over the surface.
 
 
 
 
 



 
 
 
 


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