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The importance of investigations under conditions
The development of ideas on raising plants
Natural and artificial light
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12 hours 14-hour day Abyssinian cabbage actinorhythmic reaction air temperature artificial illumination artificial light blue-violet radiation ceramsite chamber chlorophyll continuous illumination crops cucumbers cycle dark period day length day-length dry matter dry weight earth's surface effect electric light experiments flower buds fluorescent lamps fluorescent tubes flux of incandescent fruits gas-discharge lamps glass green growing plants growth horizon importance increasing infrared radiation installation consisting investigations K. A. Timiryazev leaf leaves light and darkness lighting installation MFA lamps mirror incandescent lamps natural night normal nyctophobe ontogeny optimum perilla plants photoperiodic photosynthesis phototropic plant production plants were grown quantum yield radiant energy radiant flux power radish raising plants rays reaction of plants red-orange seedling emergence solar radiation spectral composition spectrum sunlight Table test plants thermistor tion tomato plants treatment ultraviolet radiation utilization variety vegetative vessels visible radiation water filter wavelength white light yellow-green yield