Category: Culture

LIGHT METERS: Measurement

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago The Light Intensity Meter it is claimed reads both sunlight and artificial light; advt. A84-1083 Read More

LIGHT, NATURAL: And Epiphytes

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago Requirements for optimum growth for high light and low light plants; theoretical; refer to A85-819 Read More

LIGHT, NATURAL: Characteristics

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago And the reaction of different genera of plants to it outdoors and inside the greenhouse: vandas, cattleyas, phalaenopsis; on leaf burn; refer to AH86-97It consists of four P's: photosynthesis, in w... Read More

LIGHT, NATURAL: Checking with a Light Meter

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago After obtaining a reading, move the plants closer to or farther away from the source depending on requirements; at 1000fc, over 12 hours the exposure is 12,000fc.-hours per day; on a clear day in F... Read More

LIGHT, NATURAL: Poor Conditions in Early Spring

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago This causes growth changes in cymbidiums; April and May dullness retards growth appreciably for several years and may retard ripening and flowering for a year or more if the plants go out of phase.... Read More

LIGHTS, ELECTRIC: Blue Light

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago It stimulates the opening of stomatas or spores on the leaves for more carbon dioxide to enter; doubling the amount of natural blue light increased growth by 50% or more, is claim. OIE86Nov-2; the ... Read More

LIGHTS, ELECTRIC: Blue Lights

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago Plants grow faster under them, up to 50 to 70% faster in a blue-light enriched environment; photoreceptors in leaves absorb the light and initiate opening of spores in the stomata; no reason given.... Read More

LIGHTS, ELECTRIC: Interference with the Growth Pattern

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago An electronic insect-killer with an 80-watt power lamp left on outdoors at night 50 to 60 feet away from summering cattleyas will affect them by delaying flowering to a later date, A84-1180 Read More

LIGHTS, ELECTRIC: Hours of Use

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago Experiments indicate that using artificial light in the early morning in the greenhouse is a waste of money; instead, turn them on at 3 ofclock in the afternoon when the light is naturally strong; ... Read More

LIGHTS, ELECTRIC: Metal Halide, 1000-watt Lamps

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago Useful but the drawbacks are the high cost of the equipment that goes with them and of the electricity they burn; Vita-Lite can be used first to gain experience. A85-471 Read More