Turfgrass Management Terms N

Native - species which originated in North America

Native grasses - grasses that are indigenous or that occur naturally in a particular region

Native soil – unamended soil that is commonly found in a specified area

Nematicide – pesticide used to destroy nematodes

Nematode - small, round worms, usually microscopic and colorless, that live free in moist soil, water or decaying or living organic matter. Parasitic forms puncture plant tissues and live by sucking the juice of the plant

Nerve - vein on glume, lemma, or palea

Node - region on a stem where where leaves and branches are produced

Non-selective – a pest control that affects a broad spectrum of plants or animals rather than targeting a select type of weed, insect or other animal. For example, non-selective herbicides are plant controls that kill or injure all plant types, whether grass or broadleaf plants

Noxious weeds - weeds categorized by law as objectionable in a seed lot for commercial sale

NPK (also N-P-K) – the ratio of nitrogen (N), phosphorus (P) and potassium (K) indicated by three numbers on a fertilizer label. N-P-K numbers represent the percentages of these nutrients in a product, by total weight

Nursery - area set aside for testing new turfgrass cultivars and chemicals and for growing replacement turf for the golf course

Nutrient deficiency – condition that occurs when a plant doesn't get enough of a necessary nutrient. Deficiencies can happen when the nutrient is in short supply in soil or when the nutrient is plentiful, but soil pH limits its availability to plants. Iron-deficient grass, for example, may turn yellow or pale green 

Nutrients – substances such as elements, minerals and vitamins that provide nourishment essential or beneficial to plant life or healthy growth. Some nutrients are required; others are helpful, but not essential


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