Top-dressing 
A bulky material, such as sand or topsoil, or a composted material. It is typically applied to a surface, which might be an established sward or a newly seeded one, at relatively high quantities, typically 0.5 kg per metre square and greater. Topdressing is not the application of a fertiliser to a surface, due to the much lighter application rates given for fertilisers. The term can also refer to the action of applying a ‘top-dressing' to a surface. The main reason for applying topdressing is to maintain and improve the evenness of the playing surface.
Top-dressing a Lawn
This activity is routinely carried out on higher quality lawns, however, there is a lot of benefit to be gained from top-dressing general lawns as a light application is easy to apply and work in and the material itself is reasonably priced.
Topper Mower
A rotary action cutting mechanism, with a central blade carrier which has a swivelling blade attached at each end. The mower is typically PTO driven, rear mounted, with adjustable side skids to set the height of cut. The finish with a topper mower is coarser than that of a rotary mower, with arisings being collected at the side skids in rows. This type of mower is suitable for use in horse paddocks, meadows and rough areas. Typical cutting widths for these mowers are 1.1m, 1.4m, 1.6m and 1.8m.
Topping
A small amount of leaf is removed by a mower from a turf surface. Topping is typically carried out on young grass seedlings which are gradually developing, or during periods of slow growth which particularly occurs over late autumn to winter. The purpose of topping a grass sward is to ensure it does not become excessively long, whilst at the same time not cutting it too short or frequently and putting unnecessary stress on the sward.
Treading
The action of treading a soil with body weight being applied to an individual's heel; with the sole of the feet being slightly raised. Watching a person carry out treading looks like the shuffling of a penguin in a forward motion. Treading is essential to firm a soil prior to applying another layer of soil, or to produce a suitable seed or turf bed. This is occasionally called Heeling.
Trimmer [2]
A mechanical device, with a rapidly rotating spindle at the end of a long-handled shaft, and with a cutting mechanism consisting of nylon cord, or nylon strips. They can be powered by electricity, via cables; cordless via batteries; or 2-stroke petrol engine. Compare Brushcutter.
Trimmer [3]
An item of equipment, which might be handheld edging shears, or a mechanical powered device for trimming turf edges.
Triple Mower
A mechanised ride on 3-unit cylinder mower, commonly used for the mowing of golf greens and tees.
Trotting Off
The use of long-handled edging shears to trim the edge of a lawn, especially where it borders a flower bed or ornamental shrubs. This activity would also include picking up the grass clippings, hand weeding up to the start of the flowers or shrubs (which would typically be 300mm or less) and removing the clippings and weeds to a waste facility or compost heap. Edging a lawn and Trotting off are essentially the same tasks, however, in contrast to edging a lawn, which may be when significant grass overhang might be trimmed back, trotting off can be thought of as possibly a speedier edging, witho
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Turf / Sod Cutter