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NAA (naphthalene acetic acid) A synthetically produced auxin. (Nelson, 2003)

Necrosis The state of being dead and discolored. (Nelson, 2003)

Nematicide An agent or preparation used for killing nematodes. (Nelson, 2003)

NFT (nutrient film technique) The culture of plants in a system where a thin film (a few millimeters deep) of nutrient solution is circulated through a trough that also contains the plant roots. It is a specialized form of hydroponics. (Nelson, 2003)