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There are 84 entries in the glossary.
Pages: «1 2 3 4 5 6 7 8 9 »
Term Definition
CLOSED SYSTEMA hydroponic system, like nutrient film technique (NFT) systems, that recirculates the nutrient solution.
 
CONDITIONINGTo soak new Rockwool in an acidic solution to lower the pH from 8.0 to 5.5.
 
CONDUCTIVITYThe scale, described as electrical conductivity (EC) or conductivity factor (CF), that is used to measure the strength of nutrient solution.
 
COPPER (Cu)This micronutrient is an internal catalyst and acts as an electron carrier; it is also believed to play a role in nitrogen fixation.
 
CROSS-POLLINATIONTransferring pollen from the flowers of one plant of a species to the stigma of another plant of the same species.
 
DAMPING-OFF FUNGUSDisease that attacks young seedlings and cuttings, causing stems to rot at the base; overwatering is the main cause of damping-off.
 
DIOECIOUSVarieties or species with male and female flowers on separate plants.
 
DISSOLVED SOLIDS or TOTAL DISSOLVED SOLIThe amount of dissolved solids, usually fertilizer salts, that are measured in water in parts per million.
 
DRIP AERATIONA hydroponic method wherein air pressure from a small air pump is used to percolate nutrient solution out through a ring of feeder tubing which encircles the plant.
 
DRIP SYSTEM (DRIP EMITTER SYSTEM)A very efficient watering system that employs a main hose with small water emitters. Water is metered out of the emitters, one drop at a time.
 


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