Turfgrass Management Terms J - K - L

Kentucky Bluegrass - dense, cool-season grass introduced to the United States by early European settlers. Because of its low shade tolerance, Bluegrass seed is often sold in a blend with other grass seeds that do better in the shade. A vigorous spreading grass, it grows most actively in the spring and fall

Knotty - with a hardened mass at the base or nodes

Lacerate - appearing torn at the edge or irregularly cleft

Lawn aerator - garden tool that pokes air holes into the turf. There are two basic types: Spike aerators and core aerators. Spike aerators push into the soil to create the holes. Core aerators push a cylinder into the soil, extract a plug and deposit it on top of the grass. Core aeration is the preferred method to relieve compacted soils

Lawn spreader - tool for distributing material, such as grass seed or fertilizer, across the lawn. Broadcast or rotary spreaders scatter the material in a fan shape. Drop spreaders are more precise and drop the material straight to the ground. Spreaders can be hand-held or push models. For larger applications, electric or gas motor spreaders are available

Leaching - occurs when rainfall or irrigation water flushes substances and nutrients through soil. It is primarily performed to remove the buildup of harmful nutrients, including salt. After leaching, it's important to fertilize your lawn with nutrients that promote growth, such as nitrogen. This can be done by applying high quality lawn fertilizer

Leaf blower - tool to mechanically move leaves and other lawn trimmings by the force of air. Blowers can be gas-powered or electric, hand-held or shoulder-mounted 

Lemma - the lower bract of the two bracts of a grass floret

Ligule - the membranous or hairy, usually flap-like appendage on the inside of a leaf at the junction of the sheath and blade

Lime - substance produced from natural limestone that's applied to or worked into lawn and garden soils to restore pH balance in acidic soil. Lime increases alkalinity (by neutralizing acidity) so that nutrients are more available to plants. Materials that contain calcium and magnesium also include, shell, slag, and gypsum

Liming - application of lime to raise the pH of overly acidic soil. Most lawn grasses do best in soil with slightly acidic, near-neutral soil pH. A soil test will reveal whether your lawn needs liming, and the test may also recommend the volume of lime needed. Lime can be applied any time, but applying just before winter sets in will allow the freezing and thawing to better incorporate the material into the soil 

Lip- abutment of sod raised 3 to 4 inches above the sand level of a bunker. It faces the putting green and prevents a player from putting out

Liquid fertilizer - plant nutrients applied in solution

Localized dry spot - dry area of sod and soil that resists water as normally applied; caused by various factors such as heavy thatch, soil or fungal organisms


Back to Turfgrass Management