Guys
Here are some old links with lots of info on topdressing and topdressers.
http://www.lawnsite.com/showthread.p...light=topdress
http://www.lawnsite.com/showthread.p...light=topdress
Here are the highlights:
I topdress around 45 lawns a season and have done so for the last few years
My procedure for spring or fall topdressing
1) mow as low as the mower will go. This ensures that the seeds will get adequate
sunlight and makes draging easier.
2) dethatch and remove debris to provide a bare seed bed.
3) areate to provide more seed to soil contact and loosen the soil. also gets the compost
deeper.
4) overseed (2-5 lbs/ 1000sq ft) rate depending on thickness of turf
5) topdress. I use a topdresser purchased from a golf course, holds about 1/3 of
a cubic yard, has a 5hp kohler , a conveyor belt and a spreading brush. a real crowd stopper.
http://www.turfco.com/html/selfpropelledtd.htm
It drags a mat behind it. The mat is specially designed . It has 1"x12" steel bars
with holes at each end. Cable links all the bars together and forms a 4'x4' mat.
The straight edges cut the high spots and level low ones. better than chain link fence.
I usually apply between 1/2 and 1 cubic yard of compost or triple mix per 1000 sq ft.
To figure the amount of material there are two easy methods.
a) LxWxH
10'x 10'x 2"
=10'x10'x .17
=17/27
=0.6 cu yd
b) or use the chart:
Depth/ 1000 sf ft / 1 acre
1" 3.1 yd 135 yd
.5" 1.6 yd 69 yd
.25" .78 yd 35 yd
.125" .40 yd 18 yd
Just measure the yard and multiply the sq ft by the desired number of yds to achieve
the correct depth.
I have found that 1" coverage is too deep and too expensive.
Between 1/8" and 1/4" (1/2 - 3/4 cu yd / 1000 sq ft) is usually good.
Any less than 1/8" is not worth the effort of steps 1-4.
6) Final drag to level and to work the compost into the holes.
7) water, water, water
8) patience, compost disappears in a wk or 2 but real thickening is not seen until the
bluegrass comes up in a month or so. Notice the deep green from the N in the compost.
Why topdress?
1) remove bumps, lumps, level lawn, etc (no rolling)
2) fill in bare spots, repair damage
3) nutrients, micronutrients
4) organic matter
5) CEC
6) water retention
7) profitable
8) loosen soil and relieve compaction
9) disease prevention
10) high seedling germination rate
11) pH modification
12) decompose thatch
13) improve soil
14) stimulate growth
15) improve drainage
16) warm soil in spring
Remember that a yd of compost weights over 1000 lbs and is usually easier if delivered unless you only need a yard or two. I use the bucket on the tractor to load the topdresser and that saves hours of shovelling.
Other sites of interest include:
http://sandsquad.com/
http://industryclick.com/magazinear...7&magazineid=35
http://industryclick.com/magazinear...7&magazineid=35
http://industryclick.com/magnewsart...7&magazineid=35