Dead Grass 
Grass that has not managed to survive. There can be multiple causes to this event.
Examples might be:
• Drought may have killed off poorly rooted grasses;
• Waterlogging has been for an extended period of time;
• Pests have eaten grass roots, especially over the autumn and winter and in dry spring and summer conditions the dead grass is more noticeable;
• Fertiliser spillage;
• Fertiliser over application;
Dead Patches
Browned or bare areas of grass which might have been caused by one or more of a range of contributory factors. See Dead Grass.
Deck
1. A mowing unit, mainly meaning that which is attached to a ride-on rotary or flail mower.
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Desso Grassmaster
Disc Harrow
An item of equipment which is pulled by a tractor. It consists of a horizontal bar onto which are fixed a number of disc blades which cut into a soil to cultivate it.
Divot
A piece of turf that has become partially or fully detached from the surface and underlying root system. A divot usually results from the action of players, or horses where on a racecourse.
Divot Fork
A small hand fork, typically with three prongs, attached to a long wooden handle. The benefit of a long handle is to reduce the need to bend to carry out divoting of sports surfaces, especially football and rugby. The small fork head allows for accurate repair work to small divots, something which cannot adequately be achieved using a larger garden or border fork. The tool is also sometimes referred to as a Divot Repair Fork.
Divot Mix [1]
Typically, a sandy soil used for levelling devoted areas, especially those which have been heavily scared. Often a divot mix will also contain grass seed which has been pre-mixed into it.
Divoting
The action of replacing or repairing divots. Benefits of divoting include returning the surface to a good condition in as short a period as possible. This will include maintaining surface evenness, aiding rooting of a replaced divot where it has been replaced fairly soon after becoming detached, retaining ground cover and contributing to maintaining good playing quality. A divot mix, which may at times also include grass seed, may also be applied as part of the divoting process, especially on golf tees and heavily divoted winter pitches.
Dormant Seeding