sod = χλοοτάπητας;
plug = πώμα, τάπα;
sod "heals" = "δέσει";
From an irrigation controller manual
Using your spade, cut a rectangular sod plug measuring 24 by 24 inches, penetrating down three to four inches. With your spade at an angle, work the spade to cut the grass roots under the sod to free the plug from the soil beneath. Carefully lay back the sod, exposing the soil beneath. It is important to produce a large piece of sod with no tear in it to allow good “sealing” of the sod over the installed sensor and insure that irrigation water does not run directly from the lawn surface to the sensor rods, forming a pool of water around the sensor and producing unreliable readings while the sod “heals.”